1 Environmental Ethics

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Environmental Ethics
Andrew Brennan and Yeuk-Sze Lo
Stanford Encyclopedia of Philosophy
http://plato.stanford.edu/entries/ethics-environmental/
First published Mon Jun 3, 2002; substantive revision Thu Jan 3, 2008
Redaction: PR / 24 October 2011
1. Introduction: The Challenge of Environmental Ethics
Suppose that putting out natural fires, culling feral animals or destroying some individual members of overpopulated
indigenous species is necessary for the protection of the integrity of a certain ecosystem. Will these actions be
morally permissible or even required? Is it morally acceptable for farmers in non-industrial countries to practice
slash and burn techniques to clear areas for agriculture? Consider a mining company which has performed open pit
mining in some previously unspoiled area. Does the company have a moral obligation to restore the landform and
surface ecology? And what is the value of a humanly restored environment compared with the originally natural
environment? It is often said to be morally wrong for human beings to pollute and destroy parts of the natural
environment and to consume a huge proportion of the planet’s natural resources. If that is wrong, is it simply
because a sustainable environment is essential to (present and future) human well-being? Or is such behaviour also
wrong because the natural environment and/or its various contents have certain values in their own right so that
these values ought to be respected and protected in any case? These are among the questions investigated by
environmental ethics. Some of them are specific questions faced by individuals in particular circumstances, while
others are more global questions faced by groups and communities. Yet others are more abstract questions
concerning the value and moral standing of the natural environment and its nonhuman components.
In the literature on environmental ethics the distinction between instrumental value and intrinsic value (meaning
“non-instrumental value”) has been of considerable importance. The former is the value of things as means to
further some other ends, whereas the latter is the value of things as ends in themselves regardless of whether they
are also useful as means to other ends. For instance, certain fruits have instrumental value for bats who feed on
them, since feeding on the fruits is a means to survival for the bats. However, it is not widely agreed that fruits have
value as ends in themselves. We can likewise think of a person who teaches others as having instrumental value for
those who want to acquire knowledge. Yet, in addition to any such value, it is normally said that a person, as a
person, has intrinsic value, i.e., value in his or her own right independently of his or her prospects for serving the
ends of others. For another example, a certain wild plant may have instrumental value because it provides the
ingredients for some medicine or as an aesthetic object for human observers. But if the plant also has some value in
itself independently of its prospects for furthering some other ends such as human health, or the pleasure from
aesthetic experience, then the plant also has intrinsic value. Because the intrinsically valuable is that which is good
as an end in itself, it is commonly agreed that something’s possession of intrinsic value generates a prima facie
direct moral duty on the part of moral agents to protect it or at least refrain from damaging it (see O’Neil 1992 and
Jameson 2002 for detailed accounts of intrinsic value).
Many traditional western ethical perspectives, however, are anthropocentric or human-centered in that either they
assign intrinsic value to human beings alone (i.e., what we might call anthropocentric in a strong sense) or they
assign a significantly greater amount of intrinsic value to human beings than to any nonhuman things such that the
protection or promotion of human interests or well-being at the expense of nonhuman things turns out to be nearly
always justified (i.e., what we might call anthropocentric in a weak sense). For example, Aristotle (Politics, Bk. 1,
Ch. 8) maintains that “nature has made all things specifically for the sake of man” and that the value of nonhuman
things in nature is merely instrumental. Generally, anthropocentric positions find it problematic to articulate what is
wrong with the cruel treatment of nonhuman animals, except to the extent that such treatment may lead to bad
consequences for human beings. Immanuel Kant (“Duties to Animals and Spirits”, in Lectures on Ethics), for
instance, suggests that cruelty towards a dog might encourage a person to develop a character which would be

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desensitized to cruelty towards humans. From this standpoint, cruelty towards nonhuman animals would be
instrumentally, rather than intrinsically, wrong. Likewise, anthropocentrism often recognizes some non-intrinsic
wrongness of anthropogenic (i.e. human-caused) environmental devastation. Such destruction might damage the
well-being of human beings now and in the future, since our well-being is essentially dependent on a sustainable
environment (see Passmore 1974, Bookchin 1990, Norton, Hutchins, Stevens, and Maple (eds.) 1995).
When environmental ethics emerged as a new sub-discipline of philosophy in the early 1970s, it did so by posing a
challenge to traditional anthropocentrism. In the first place, it questioned the assumed moral superiority of human
beings to members of other species on earth. In the second place, it investigated the possibility of rational arguments
for assigning intrinsic value to the natural environment and its nonhuman contents.
It should be noted, however, that some theorists working in the field see no need to develop new, non-
anthropocentric theories. Instead, they advocate what may be called enlightened anthropocentrism (or, perhaps more
appropriately called, prudential anthropocentrism). Briefly, this is the view that all the moral duties we have
towards the environment are derived from our direct duties to its human inhabitants. The practical purpose of
environmental ethics, they maintain, is to provide moral grounds for social policies aimed at protecting the earth’s
environment and remedying environmental degradation. Enlightened anthropocentrism, they argue, is sufficient for
that practical purpose, and perhaps even more effective in delivering pragmatic outcomes, in terms of policy-
making, than non-anthropocentric theories given the theoretical burden on the latter to provide sound arguments for
its more radical view that the nonhuman environment has intrinsic value (cf. Norton 1991, de Shalit 1994, Light and
Katz 1996). Furthermore, some prudential anthropocentrists may hold what might be called cynical
anthropocentrism, which says that we have a higher-level anthropocentric reason to be non-anthropocentric in our
day-to-day thinking. Suppose that a day-to-day non-anthropocentrist tends to act more benignly towards the
nonhuman environment on which human well-being depends. This would provide reason for encouraging non-
anthropocentric thinking, even to those who find the idea of non-anthropocentric intrinsic value hard to swallow. In
order for such a strategy to be effective one may need to hide one’s cynical anthropocentrism from others and even
from oneself.
2. The Early Development of Environmental Ethics
Although nature was the focus of much nineteenth and twentieth century philosophy, contemporary environmental
ethics only emerged as an academic discipline in the 1970s. The questioning and rethinking of the relationship of
human beings with the natural environment over the last thirty years reflected an already widespread perception in
the 1960s that the late twentieth century faced a “population time bomb” and a serious environmental crisis. Among
the accessible work that drew attention to a sense of crisis was Rachel Carson’s Silent Spring (1963), which
consisted of a number of essays earlier published in the New Yorker magazine detailing how pesticides such as
DDT, aldrin and deildrin concentrated through the food web. Commercial farming practices aimed at maximizing
crop yields and profits, Carson speculates, are capable of impacting simultaneously on environmental and public
health.
On the other hand, historian Lynn White Jr., in a much-cited essay published in 1967 (White 1967) on the historical
roots of the environmental crisis, argues that the main strands of Judeo-Christian thinking had encouraged the
overexploitation of nature by maintaining the superiority of humans over all other forms of life on earth, and by
depicting all of nature as created for the use of humans. White’s thesis is widely discussed in theology, history, and
has been subject to some sociological testing as well as being regularly discussed by philosophers (see Whitney
1993, Attfield 2001). Central to the rationale for his thesis were the works of the Church Fathers and The Bible
itself, supporting the anthropocentric perspective that humans are the only things that matter on Earth.
Consequently, they may utilize and consume everything else to their advantage without any injustice. For example,
Genesis 1:27-8 states: “God created man in his own image, in the image of God created he him; male and female
created he them. And God blessed them, and God said unto them, Be fruitful, and multiply, and replenish the earth,
and subdue it: and have dominion over fish of the sea, and over fowl of the air, and over every living thing that
moveth upon the earth.” Likewise, Thomas Aquinas (Summa Contra Gentiles, Bk. 3, Pt 2, Ch 112) argued that
nonhuman animals are “ordered to man’s use”. According to White, the Judeo-Christian idea that humans are
created in the image of the transcendent supernatural God, who is radically separate from nature, also by extension
radically separates humans themselves from nature. This ideology further opened the way for untrammeled

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exploitation of nature. Modern Western science itself, White argues, was “cast in the matrix of Christian theology”
so that it too inherited the “orthodox Christian arrogance toward nature” (White Jr. 1967, 1207). Clearly, without
technology and science, the environmental extremes to which we are now exposed would probably not be realized.
White’s thesis, however, is that given the modern form of science and technology, Judeo-Christianity itself provides
the original deep-seated drive to unlimited exploitation of nature. Nevertheless, White argued that some minority
traditions within Christianity (e.g., the views of St. Francis) might provide an antidote to the “arrogance” of a
mainstream tradition steeped in anthropocentrism.
Around the same time, the Stanford ecologist, Paul Ehrlich, published The Population Bomb (1968), warning that
the growth of human population threatened the viability of planetary life-support systems. The sense of
environmental crisis stimulated by those and other popular works was intensified by NASA’s production and wide
dissemination of a particularly potent image of earth from space taken at Christmas 1968 and featured in the
Scientific American in September 1970. Here, plain to see, was a living, shining planet voyaging through space and
shared by all of humanity, a precious vessel vulnerable to pollution and to the overuse of its limited capacities. In
1972 a team of researchers at MIT led by Dennis Meadows published the Limits to Growth study, a work that
summed up in many ways the emerging concerns of the previous decade and the sense of vulnerability triggered by
the view of the earth from space. In §10 of the commentary to the study, the researchers wrote:
We affirm finally that any deliberate attempt to reach a rational and enduring state of equilibrium by planned
measures, rather than by chance or catastrophe, must ultimately be founded on a basic change of values and goals
at individual, national and world levels.
The call for a “basic change of values” in connection to the environment (a call that could be interpreted in terms of
either instrumental or intrinsic values) reflected a need for the development of environmental ethics as a new sub-
discipline of philosophy.
The new field emerged almost simultaneously in three countries—the United States, Australia, and Norway. In the
first two of these countries, direction and inspiration largely came from the earlier twentieth century American
literature of the environment. For instance, the Scottish emigrant John Muir (founder of the Sierra Club and “father
of American conservation”) and subsequently the forester Aldo Leopold had advocated an appreciation and
conservation of things “natural, wild and free”. Their concerns were motivated by a combination of ethical and
aesthetic responses to nature as well as a rejection of crudely economic approaches to the value of natural objects (a
historical survey of the confrontation between Muir’s reverentialism and the human-centered conservationism of
Gifford Pinchot (one of the major influences on the development of the US Forest Service) is provided in Norton
1991; also see Cohen 1984 and Nash (ed) 1990). Leopold’s A Sand County Almanac (1949), in particular,
advocated the adoption of a “land ethic”:
That land is a community is the basic concept of ecology, but that land is to be loved and respected is an extension
of ethics. (vii-ix)
A thing is right when it tends to preserve the integrity, stability, and beauty of the biotic community. It is wrong
when it tends otherwise. (224-5)
However, Leopold himself provided no systematic ethical theory or framework to support these ethical ideas
concerning the environment. His views therefore presented a challenge and opportunity for moral theorists: could
some ethical theory be devised to justify the injunction to preserve the integrity, stability and beauty of the
biosphere?
The land ethic sketched by Leopold, attempting to extend our moral concern to cover the natural environment and its
nonhuman contents, was drawn on explicitly by the Australian philosopher Richard Routley (later Sylvan).
According to Routley (1973 (cf. Routley and Routley 1980)), the anthropocentrism imbedded in what he called the
“dominant western view”, or “the western superethic”, is in effect “human chauvinism”. This view, he argued, is
just another form of class chauvinism, which is simply based on blind class “loyalty” or prejudice, and unjustifiably
discriminates against those outside the privileged class. Furthermore, in his “last man” (and “last people”)

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arguments, Routley asked us to imagine the hypothetical situation in which the last person, surviving a world
catastrophe, acted to ensure the elimination of all other living things and the destruction of all the landscapes after
his demise. From the human-chauvinistic (or absolutely anthropocentric) perspective, the last person would do
nothing morally wrong, since his or her destructive act in question would not cause any damage to the interest and
well-being of humans, who would by then have disappeared. Nevertheless, Routley points out that there is a moral
intuition that the imagined last act would be morally wrong. An explanation for this judgment, he argued, is that
those nonhuman objects in the environment, whose destruction is ensured by the last person, have intrinsic value, a
kind of value independent of their usefulness for humans. From his critique, Routley concluded that the main
approaches in traditional western moral thinking were unable to allow the recognition that natural things have
intrinsic value, and that the tradition required overhaul of a significant kind.
Leopold’s idea that the “land” as a whole is an object of our moral concern also stimulated writers to argue for
certain moral obligations toward ecological wholes, such as species, communities, and ecosystems, not just their
individual constituents. The U.S.-based theologian and environmental philosopher Holmes Rolston III, for instance,
argued that species protection was a moral duty (Rolston 1975). It would be wrong, he maintained, to eliminate a
rare butterfly species simply to increase the monetary value of specimens already held by collectors. Like Routley’s
“last man” arguments, Rolston’s example is meant to draw attention to a kind of action that seems morally dubious
and yet is not clearly ruled out or condemned by traditional anthropocentric ethical views. Species, Rolston went on
to argue, are intrinsically valuable and are usually more valuable than individual specimens, since the loss of a
species is a loss of genetic possibilities and the deliberate destruction of a species would show disrespect for the very
biological processes which make possible the emergence of individual living things (also see Rolston 1989, Ch 10).
Natural processes deserve respect, according to Rolston’s quasi-religious perspective, because they constitute a
nature (or God) which is itself intrinsically valuable (or sacred).
Meanwhile, the work of Christopher Stone (a professor of law at the University of Southern California) had become
widely discussed. Stone (1972) proposed that trees and other natural objects should have at least the same standing
in law as corporations. This suggestion was inspired by a particular case in which the Sierra Club had mounted a
challenge against the permit granted by the U.S. Forest Service to Walt Disney Enterprises for surveys preparatory
to the development of the Mineral King Valley, which was at the time a relatively remote game refuge, but not
designated as a national park or protected wilderness area. The Disney proposal was to develop a major resort
complex serving 14000 visitors daily to be accessed by a purpose-built highway through Sequoia National Park. The
Sierra Club, as a body with a general concern for wilderness conservation, challenged the development on the
grounds that the valley should be kept in its original state for its own sake.
Stone reasoned that if trees, forests and mountains could be given standing in law then they could be represented in
their own right in the courts by groups such as the Sierra Club. Moreover, like any other legal person, these natural
things could become beneficiaries of compensation if it could be shown that they had suffered compensatable injury
through human activity. When the case went to the U.S. Supreme Court, it was determined by a narrow majority that
the Sierra Club did not meet the condition for bringing a case to court, for the Club was unable and unwilling to
prove the likelihood of injury to the interest of the Club or its members. In a dissenting minority judgment, however,
justices Douglas, Blackmun and Brennan mentioned Stone’s argument: his proposal to give legal standing to natural
things, they said, would allow conservation interests, community needs and business interests to be represented,
debated and settled in court.
Reacting to Stone’s proposal, Joel Feinberg (1974) raised a serious problem. Only items that have interests, Feinberg
argued, can be regarded as having legal standing and, likewise, moral standing. For it is interests which are capable
of being represented in legal proceedings and moral debates. This same point would also seem to apply to political
debates. For instance, the movement for “animal liberation”, which also emerged strongly in the 1970s, can be
thought of as a political movement aimed at representing the previously neglected interests of some animals (see
Regan and Singer (eds.) 1976, Clark 1977, and also the entry on the moral status of animals). Granted that some
animals have interests that can be represented in this way, would it also make sense to speak of trees, forests, rivers,
barnacles, or termites as having interests of a morally relevant kind? This issue was hotly contested in the years that
followed. Meanwhile, John Passmore (1974) argued, like White, that the Judeo-Christian tradition of thought about
nature, despite being predominantly “despotic”, contained resources for regarding humans as “stewards” or
“perfectors” of God’s creation. Skeptical of the prospects for any radically new ethic, Passmore cautioned that

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traditions of thought could not be abruptly overhauled. Any change in attitudes to our natural surroundings which
stood the chance of widespread acceptance, he argued, would have to resonate and have some continuities with the
very tradition which had legitimized our destructive practices. In sum, then, Leopold’s land ethic, the historical
analyses of White and Passmore, the pioneering work of Routley, Stone and Rolston, and the warnings of scientists,
had by the late 1970s focused the attention of philosophers and political theorists firmly on the environment.
The confluence of ethical, political and legal debates about the environment, the emergence of philosophies to
underpin animal rights activism and the puzzles over whether an environmental ethic would be something new
rather than a modification or extension of existing ethical theories were reflected in wider social and political
movements. The rise of environmental or “green” parties in Europe in the 1980s was accompanied by almost
immediate schisms between groups known as “realists” versus “fundamentalists” (see Dobson 1992). The “realists”
stood for reform environmentalism, working with business and government to soften the impact of pollution and
resource depletion especially on fragile ecosystems or endangered species. The “fundies” argued for radical change,
the setting of stringent new priorities, and even the overthrow of capitalism and liberal individualism, which were
taken as the major ideological causes of anthropogenic environmental devastation. (Not that collectivist or
communist countries do better in terms of their environmental record (see Dominick 1998).)
Underlying these political disagreements was the distinction between “shallow” and “deep” environmental
movements, a distinction introduced in the early 1970s by another major influence on contemporary environmental
ethics, the Norwegian philosopher and climber Arne Næss. Since the work of Næss has been significant in
environmental politics, the discussion of his position is given in a separate section below.
3. Environmental Ethics and Politics [redacted]
4. Traditional Ethical Theories and Contemporary Environment Ethics
Although environmental ethicists often try to distance themselves from the anthropocentrism embedded in
traditional ethical views (Passmore 1974, Norton 1991 are exceptions), they also quite often draw their theoretical
resources from traditional ethical systems and theories. Consider the following two basic moral questions: (1) What
kinds of thing are intrinsically valuable, good or bad? (2) What makes an action right or wrong?
Consequentialist ethical theories consider intrinsic “value” / “disvalue” or “goodness” / “badness” to be more
fundamental moral notions than “rightness” / “wrongness”, and maintain that whether an action is right/wrong is
determined by whether its consequences are good/bad. From this perspective, answers to question (2) are informed
by answers to question (1). For instance, utilitarianism, a paradigm case of consequentialism, regards pleasure (or,
more broadly construed, the satisfaction of interest, desire, and/or preference) as the only intrinsic value in the
world, whereas pain (or the frustration of desire, interest, and/or preference) the only intrinsic disvalue, and
maintains that right actions are those that would produce the greatest balance of pleasure over pain.
As the utilitarian focus is the balance of pleasure and pain as such, the question of to whom a pleasure or pain
belongs is irrelevant to the calculation and assessment of the rightness or wrongness of actions. Hence, the
eighteenth century utilitarian Jeremy Bentham (1789), and now Peter Singer (1993), have argued that the interests of
all the sentient beings (i.e., beings who are capable of experiencing pleasure or pain)—including nonhuman ones—
aaffected by an action should be taken equally into consideration in assessing the action. Furthermore, rather like
Routley (see section 2 above), Singer argues that the anthropocentric privileging of members of the species Homo
sapiens is arbitrary, and that it is a kind of “speciesism” as unjustifiable as sexism and racism. Singer regards the
animal liberation movement as comparable to the liberation movements of women and people of colour. Unlike the
environmental philosophers who attribute intrinsic value to the natural environment and its inhabitants, Singer and
utilitarians in general attribute intrinsic value to the experience of pleasure or interest satisfaction as such, not to the
beings who have the experience. Similarly, for the utilitarian, non-sentient objects in the environment such as plant
species, rivers, mountains, and landscapes, all of which are the objects of moral concern for environmentalists, are
of no intrinsic but at most instrumental value to the satisfaction of sentient beings (see Singer 1993, Ch. 10).
Furthermore, because right actions, for the utilitarian, are those that maximize the overall balance of interest
satisfaction over frustration, practices such as whale-hunting and the killing of an elephant for ivory, which cause

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suffering to nonhuman animals, might turn out to be right after all: such practices might produce considerable
amounts of interest-satisfaction for human beings, which, on the utilitarian calculation, outweigh the nonhuman
interest-frustration involved. As the result of all the above considerations, it is unclear to what extent a utilitarian
ethic can also be an environmental ethic. This point may not so readily apply to a wider consequentialist approach,
which attributes intrinsic value not only to pleasure or satisfaction, but also to various objects and processes in the
natural environment.
Deontological ethical theories, in contrast, maintain that whether an action is right or wrong is for the most part
independent of whether its consequences are good or bad. From the deontologist perspective, there are several
distinct moral rules or duties (e.g., “not to kill or otherwise harm the innocent”, “not to lie”, “to respect the rights of
others”, “to keep promises”), the observance/violation of which is intrinsically right/wrong; i.e., right/wrong in itself
regardless of consequences. When asked to justify an alleged moral rule, duty or its corresponding right,
deontologists may appeal to the intrinsic value of those beings to whom it applies. For instance, “animal rights”
advocate Tom Regan (1983) argues that those animals with intrinsic value (or what he calls “inherent value”) have
the moral right to respectful treatment, which then generates a general moral duty on our part not to treat them as
mere means to other ends. We have, in particular, a prima facie moral duty not to harm them. Regan maintains that
certain practices (such as sport or commercial hunting, and experimentation on animals) violate the moral right of
intrinsically valuable animals to respectful treatment. Such practices, he argues, are intrinsically wrong regardless of
whether or not some better consequences ever flow from them. Exactly which animals have intrinsic value and
therefore the moral right to respectful treatment? Regan’s answer is: those that meet the criterion of being the
“subject-of-a-life”. To be such a subject is a sufficient (though not necessary) condition for having intrinsic value,
and to be a subject-of-a-life involves, among other things, having sense-perceptions, beliefs, desires, motives,
memory, a sense of the future, and a psychological identity over time.
Some authors have extended concern for individual well-being further, arguing for the intrinsic value of organisms
achieving their own good, whether those organisms are capable of consciousness or not. Paul Taylor’s version of
this view (1981 and 1986), which we might call biocentrism, is a deontological example. He argues that each
individual living thing in nature—whether it is an animal, a plant, or a micro-organism—is a “teleological-center-of-
life” having a good or well-being of its own which can be enhanced or damaged, and that all individuals who are
teleological-centers-of life have equal intrinsic value (or what he calls “inherent worth”) which entitles them to
moral respect. Furthermore, Taylor maintains that the intrinsic value of wild living things generates a prima facie
moral duty on our part to preserve or promote their goods as ends in themselves, and that any practices which treat
those beings as mere means and thus display a lack of respect for them are intrinsically wrong. A more recent and
biologically detailed defense of the idea that living things have representations and goals and hence have moral
worth is found in Agar 2001. Unlike Taylor’s egalitarian and deontological biocentrism, Robin Attfield (1987)
argues for a hierarchical view that while all beings having a good of their own have intrinsic value, some of them
(e.g., persons) have intrinsic value to a greater extent. Attfield also endorses a form of consequentialism which takes
into consideration, and attempts to balance, the many and possibly conflicting goods of different living things (also
see Varner 1998 for a more recent defense of biocentric individualism with affinities to both consequentialist and
deontological approaches). However, some critics have pointed out that the notion of biological good or well-being
is only descriptive not prescriptive (see Williams 1992 and O’Neill 1993, Ch. 2). For instance, the fact that HIV has
a good of its own does not mean that we ought to assign any positive moral weight to the realization of that good.
Note that the ethics of animal liberation or animal rights and biocentrism are both individualistic in that their various
moral concerns are directed towards individuals only—not ecological wholes such as species, populations, biotic
communities, and ecosystems. None of these is sentient, a subject-of-a-life, or a teleological-center-of-life, but the
preservation of these collective entities is a major concern for many environmentalists. Moreover, the goals of
animal liberationists, such as the reduction of animal suffering and death, may conflict with the goals of
environmentalists. For example, the preservation of the integrity of an ecosystem may require the culling of feral
animals or of some indigenous populations that threaten to destroy fragile habitats. So there are disputes about
whether the ethics of animal liberation is a proper branch of environmental ethics (see Callicott 1980, 1988, Sagoff
1984, Jamieson 1998, Crisp 1998 and Varner 2000).
Criticizing the individualistic approach in general for failing to accommodate conservation concerns for ecological
wholes, J. Baird Callicott (1980) has advocated a version of land-ethical holism which takes Leopold’s statement “A

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thing is right when it tends to preserve the integrity, stability, and beauty of the biotic community. It is wrong when
it tends otherwise” to be the supreme deontological principle. In this theory, the earth’s biotic community per se is
the sole locus of intrinsic value, whereas the value of its individual members is merely instrumental and dependent
on their contribution to the “integrity, stability, and beauty” of the larger community. A straightforward implication
of this version of the land ethic is that an individual member of the biotic community ought to be sacrificed
whenever that is needed for the protection of the holistic good of the community. For instance, Callicott maintains
that if culling a white-tailed deer is necessary for the protection of the holistic biotic good, then it is a land-ethical
requirement to do so. But, to be consistent, the same point also applies to human individuals because they are also
members of the biotic community. Not surprisingly, the misanthropy implied by Callicott’s land-ethical holism has
been widely criticized and regarded as a reductio of the position (see Aiken (1984), Kheel (1985), Ferré (1996), and
Shrader-Frechette (1996)). Tom Regan (1983, p.362), for example, has condemned the holistic land ethic’s disregard
of the rights of the individual as “environmental fascism”. Under the pressure from the charge of ecofascism and
misanthropy, Callicott (1989 Ch. 5, and 1999, Ch. 4) has later revised his position and now maintains that the biotic
community (indeed, any community to which we belong) as well as its individual members (indeed, any individual
who shares with us membership in some common community) all have intrinsic value. The controversy surrounding
Callicott’s original position, however, has inspired efforts in environment ethics to investigate possibilities of
attributing intrinsic value to ecological wholes, not just their individual constituent parts (see Lo 2001 for an
overview and critique of Callicott’s changing position over the last two decades; also see Ouderkirk and Hill (eds.)
2002 for debates between Callicott and others concerning the metaethical and metaphysical foundations for the land
ethic and also its historical antecedents). Following in Callicott’s footsteps, and inspired by Næss’s relational
account of value, Warwick Fox in his most recent work has championed a theory of “responsive cohesion” which
apparently gives supreme moral priority to the maintenance of ecosystems and the biophysical world (Fox 2007). It
remains to be seen if this position will escape the charges of misanthropy and totalitarianism laid against earlier
holistic and relational theories of value.
Individual natural entities (whether sentient or not, living or not), Andrew Brennan (1984) argues, are not designed
by anyone to fulfill any purpose and therefore lack “intrinsic function” (i.e., the function of a thing that constitutes
part of its essence or identity conditions). This, he proposes, is a reason for thinking that individual natural entities
should not be treated as mere instruments, and thus a reason for assigning them intrinsic value. Furthermore, he
argues that the same moral point applies to the case of natural ecosystems, to the extent that they lack intrinsic
function. In the light of Brennan’s proposal, Eric Katz (1991 and 1997) argues that all natural entities, whether
individuals or wholes, have intrinsic value in virtue of their ontological independence from human purpose, activity,
and interest, and maintains the deontological principle that nature as a whole is an “autonomous subject” which
deserves moral respect and must not be treated as a mere means to human ends. Carrying the project of attributing
intrinsic value to nature to its ultimate form, Robert Elliot (1997) argues that naturalness itself is a property in virtue
of possessing which all natural things, events, and states of affairs, attain intrinsic value. Furthermore, Elliot argues
that even a consequentialist, who in principle allows the possibility of trading off intrinsic value from naturalness for
intrinsic value from other sources, could no longer justify such kind of trade-off in reality. This is because the
reduction of intrinsic value due to the depletion of naturalness on earth, according to him, has reached such a level
that any further reduction of it could not be compensated by any amount of intrinsic value generated in other ways,
no matter how great it is.
As the notion of “natural” is understood in terms of the lack of human contrivance and is often opposed to the notion
of “artifactual”, one much contested issue is about the value of those parts of nature that have been interfered with
by human artifice—for instance, previously degraded natural environments which have been humanly restored.
Based on the premise that the properties of being naturally evolved and having a natural continuity with the remote
past are “value adding” (i.e., adding intrinsic value to those things which possess those two properties), Elliot argues
that even a perfectly restored environment would necessarily lack those two value-adding properties and therefore
be less valuable than the originally undegraded natural environment. Katz, on the other hand, argues that a restored
nature is really just an artifact designed and created for the satisfaction of human ends, and that the value of restored
environments is merely instrumental. However, some critics have pointed out that advocates of moral dualism
between the natural and the artifactual run the risk of diminishing the value of human life and culture, and fail to
recognize that the natural environments interfered with by humans may still have morally relevant qualities other
than pure naturalness (see Lo 1999). Two other issues central to this debate are that the key concept “natural” seems
ambiguous in many different ways (see Hume 1751, App. 3, and Brennan 1988, Ch. 6, Elliot 1997, Ch. 4), and that

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those who argue that human interference reduces the intrinsic value of nature seem to have simply assumed the
crucial premise that naturalness is a source of intrinsic value. Some thinkers maintain that the natural, or the “wild”
construed as that which “is not humanized” (Hettinger and Throop 1999, p. 12) or to some degree “not under human
control” (ibid., p. 13) is intrinsically valuable. Yet, as Bernard Williams points out (Williams 1992), we may,
paradoxically, need to use our technological powers to retain a sense of something not being in our power. The
retention of wild areas may thus involve planetary and ecological management to maintain, or even “imprison” such
areas (Birch 1990), raising a question over the extent to which national parks and wilderness areas are free from our
control. An important message underlying the debate, perhaps, is that even if ecological restoration is achievable, it
might have been better to have left nature intact in the first place.
As an alternative to consequentialism and deontology both of which consider “thin” concepts such as “goodness”
and “rightness” as essential to morality, virtue ethics proposes to understand morality—and assess the ethical
quality of actions—in terms of “thick” concepts such as “kindness”, “honesty”, “sincerity” and “justice”. As virtue
ethics speaks quite a different language from the other two kinds of ethical theory, its theoretical focus is not so
much on what kinds of things are good/bad, or what makes an action right/wrong. Indeed, the richness of the
language of virtues, and the emphasis on moral character, is sometimes cited as a reason for exploring a virtues-
based approach to the complex and always-changing questions of sustainability and environmental care (Sandler
2007). One question central to virtue ethics is what the moral reasons are for acting one way or another. For
instance, from the perspective of virtue ethics, kindness and loyalty would be moral reasons for helping a friend in
hardship. These are quite different from the deontologist’s reason (that the action is demanded by a moral rule) or
the consequentialist reason (that the action will lead to a better over-all balance of good over evil in the world).
From the perspective of virtue ethics, the motivation and justification of actions are both inseparable from the
character traits of the acting agent. Furthermore, unlike deontology or consequentialism the moral focus of which is
other people or states of the world, one central issue for virtue ethics is how to live a flourishing human life, this
being a central concern of the moral agent himself or herself. “Living virtuously” is Aristotle’s recipe for
flourishing. Versions of virtue ethics advocating virtues such as “benevolence”, “piety”, “filiality”, and “courage”,
have also been held by thinkers in the Chinese Confucian tradition. The connection between morality and
psychology is another core subject of investigation for virtue ethics. It is sometimes suggested that human virtues,
which constitute an important aspect of a flourishing human life, must be compatible with human needs and desires,
and perhaps also sensitive to individual affection and temperaments. As its central focus is human flourishing as
such, virtue ethics may seem unavoidably anthropocentric and unable to support a genuine moral concern for the
nonhuman environment. But just as Aristotle has argued that a flourishing human life requires friendships and one
can have genuine friendships only if one genuinely values, loves, respects, and cares for one’s friends for their own
sake, not merely for the benefits that they may bring to oneself, some have argued that a flourishing human life
requires the moral capacities to value, love, respect, and care for the nonhuman natural world as an end in itself (see
O’Neill 1992, O’Neill 1993, Barry 1999).
5. Wilderness, the Built Environment, Poverty and Politics
Despite the variety of positions in environmental ethics developed over the last thirty years, they have focused
mainly on issues concerned with wilderness and the reasons for its preservation (see Callicott and Nelson 1998 for a
collection of essays on the ideas and moral significance of wilderness). The importance of wilderness experience to
the human psyche has been emphasized by many environmental philosophers. Næss, for instance, urges us to ensure
we spend time dwelling in situations of intrinsic value, whereas Rolston seeks “re-creation” of the human soul by
meditating in the wilderness. Likewise, the critical theorists believe that aesthetic appreciation of nature has the
power to re-enchant human life.
By contrast, relatively little attention has been paid to the built environment, although this is the one in which most
people spend most of their time. In post-war Britain, for example, cheaply constructed new housing developments
were often poor replacements for traditional communities. They have been associated with lower amounts of social
interaction and increased crime compared with the earlier situation. The destruction of highly functional high-
density traditional housing, indeed, might be compared with the destruction of highly diverse ecosystems and biotic
communities. Likewise, the loss of the world’s huge diversity of natural languages has been mourned by many, not
just professionals with an interest in linguistics. Urban and linguistic environments are just two of the many “places”
inhabited by humans. Some philosophical theories about natural environments and objects have potential to be

9
extended to cover built environments and non-natural objects of several sorts (see King 2000, Light 2001, Palmer
2003, while Fox 2007 aims to include both built and natural environments in the scope of a single ethical theory).
Certainly there are many parallels between natural and artificial domains: for example, many of the conceptual
problems involved in discussing the restoration of natural objects also appear in the parallel context of restoring
human-made objects.
The focus on the value of wilderness and the importance of its preservation has overlooked another important
problem – namely that lifestyles in which enthusiasms for nature rambles, woodland meditations or mountaineering
can be indulged demand a standard of living that is far beyond the dreams of most of the world’s population.
Moreover, mass access to wild places would likely destroy the very values held in high esteem by the “natural
aristocrats”, a term used by Hugh Stretton (1976) to characterize the environmentalists “driven chiefly by love of the
wilderness”. Thus, a new range of moral and political problems open up, including the environmental cost of tourist
access to wilderness areas, and ways in which limited access could be arranged to areas of natural beauty and
diversity, while maintaining the individual freedoms central to liberal democracies.
Lovers of wilderness sometimes consider the high human populations in some developing countries as a key
problem underlying the environmental crisis. Rolston (1996), for instance, claims that (some) humans are a kind of
planetary “cancer”. He maintains that while “feeding people always seems humane, ... when we face up to what is
really going on, by just feeding people, without attention to the larger social results, we could be feeding a kind of
cancer.” This remark is meant to justify the view that saving nature should, in some circumstances, have a higher
priority than feeding people. But such a view has been criticized for seeming to reveal a degree of misanthropy,
directed at those human beings least able to protect and defend themselves (see Attfield 1998, Brennan 1998a). The
empirical basis of Rolston’s claims has been queried by work showing that poor people are often extremely good
environmental managers (Martinez-Alier 2002). Guha’s worries about the elitist and “missionary” tendencies of
some kinds of deep green environmentalism in certain rich western countries can be quite readily extended to
theorists such as Rolston (Guha 1999). Can such an apparently elitist sort of wilderness ethics ever be democratised?
How can the psychically-reviving power of the wild become available to those living in the slums of Calcutta or Sao
Paolo? These questions so far lack convincing answers.
Furthermore, the economic conditions which support the kind of enjoyment of wilderness by Stretton’s “natural
aristocrats”, and more generally the lifestyles of many people in the affluent countries, seem implicated in the
destruction and pollution which has provoked the environmental turn in the first place. For those in the richer
countries, for instance, engaging in outdoor recreations usually involves the motor car. Car dependency, however, is
at the heart of many environmental problems, a key factor in urban pollution, while at the same time central to the
economic and military activities of many nations and corporations, for example securing and exploiting oil reserves.
In an increasingly crowded industrialised world, the answers to such problems are pressing. Any adequate study of
this intertwined set of problems must involve interdisciplinary collaboration among philosophers and theorists in the
social as well as the natural sciences.
Connections between environmental destruction, unequal resource consumption, poverty and the global economic
order have been discussed by political scientists, development theorists, geographers and economists as well as by
philosophers. Links between economics and environmental ethics are particularly well established. Work by Mark
Sagoff (1988), for instance, has played a major part in bringing the two fields together. He argues that “as citizens
rather than consumers” people are concerned about values, which cannot plausibly be reduced to mere ordered
preferences or quantified in monetary terms (also see Shrader-Frechette 1987, O’Neill 1993, and Brennan 1995).
The potentially misleading appeal to economic reason used to justify the expansion of the corporate sector has also
come under critical scrutiny by globalisation theorists (see Korten 1999). These critiques do not aim to eliminate
economics from environmental thinking; rather, they resist any reductive, and strongly anthropocentric, tendency to
believe that all social and environmental problems are fundamentally or essentially economic.
Other interdisciplinary approaches link environmental ethics with biology, policy studies, public administration,
political theory, cultural history, post-colonial theory, literature, geography, and human ecology (for some examples,
see Norton, Hutchins, Stevens, Maple 1995, Shrader-Frechette 1984, Gruen and Jamieson (eds.) 1994, Karliner
1997, Diesendorf and Hamilton 1997, Schmidtz and Willott 2002). Many of the more recent assessments of issues
concerned with biodiversity, ecosystem health, poverty, environmental justice and sustainability look at both human

10
and environmental issues, eschewing in the process commitment either to a purely anthropocentric or purely
ecocentric perspective (see Hayward and O’Neill 1997, and Dobson 1999 for collections of essays looking at the
links between sustainability, justice, welfare and the distribution of environmental goods). The future development
of environmental ethics depend on these, and other interdisciplinary synergies, as much as on its anchorage within
philosophy.
6. Pathologies of Environmental Crisis: Theories and Empirical Research
Part of environmental philosophy’s project since its inception is the diagnosis of the origins of our present-day
environmental extremities. The best known of these is probably Lynn White’s theory. As seen in section 2 above,
White argues that Judæo-Christian monotheism, because of its essentially anthropocentric attitude towards nature, is
the ideological source of the modern environmental crisis. At the heart of his philosophical cum cultural-historical
analysis seems to be a simple structure:
W1. Christianity leads to anthropocentrism.
W2. Anthropocentrism leads to environmentally damaging behaviours.
W3. So, Christianity is the origin of environmental crisis.
The second premise of White’s argument also seems to have a central place in a number of rival diagnoses. In fact,
the structure of the major theories in the field is regularly of this sort: (1) X leads to anthropocentrism, (2)
anthropocentrism leads to environmentally damaging behaviours; therefore (3) X is the origin of environmental
crisis. Three other well-known cases have already been discussed (section 3 above), namely: ecofeminism (which
identifies X with those patterns of thought that are characteristically patriarchal), deep ecology (which takes X to be
atomistic individualism), and the new animism (which regards the disenchantment of nature as the X-factor).
The four theories all seem to have one view in common: that anthropocentrism is at the heart of the problem of
environmental destructiveness. If anthropocentrism is the problem, then perhaps non-anthropocentrism is the
solution. At this point, it may be helpful to separate two theses of non-anthropocentrism, ones that are not normally
distinguished in the literature:
The evaluative thesis (of non-anthropocentrism) is the claim that natural nonhuman things have intrinsic value, i.e.,
value in their own right independent of any use they have for others.
The psycho-behavioural thesis (of non-anthropocentrism) is the claim that people who believe in the evaluative
thesis of non-anthropocentrism are more likely to behave environmentally (i.e., behave in beneficial ways, or at least
not in harmful ways, towards the environment) than those who do not.
Much of the last three decades of environmental ethics has been spent analysing, clarifying and examining the
evaluative thesis of non-anthropocentrism, which has now achieved a nearly canonical status within the discipline.
By contrast, the psycho-behavioural thesis is seldom discussed, but is part of the tacit background of environmental
ethics. When it does get explicit mention this is often in the introductions or prefaces of books, or in reference works
– for example, when it is said that deep ecology’s “greatest influence … may be through the diverse forms of
environmental activism that it inspires” (Taylor and Zimmerman 2005, compare Rolston 1988, xii, Sessions 1995,
xx-xxi, and Sylvan and Bennett 1994, 4-5). If the psycho-behavioural thesis is true, then it is important in two ways:
(1) it provides a rationale for both the diagnosis and solution of environmental problems, and (2) it gives practical
justification to the discipline of environmental ethics itself (conceived as the mission to secure converts to the
evaluative thesis of non-anthropocentrism). Conversely, if the psycho-behavioural thesis turns out to be false, then—
since the thesis is the common tacit assumption of all four theories—not only the discipline itself, but also the four
major diagnostic theories of the origin of the environmental predicament will be seriously undermined .
Central to the psycho-behavioural thesis is a problematic assumption: that if people believe they have a moral duty
to respect nature or believe that natural things are intrinsically valuable, then they really will act in more
environmental-friendly ways. This empirical question cannot be answered by purely a priori philosophical
reasoning. In fact, the other core premises in the four major philosophical theories on the origin of environmental

11
crisis are also empirical claims about social and cultural reality. To be credible, they must be able to stand up to
empirical testing. For example, are people who think in dualistic and hierarchical ways (as described by feminists) in
fact more likely to have anthropocentric attitudes and more likely to act harmfully towards the environment? Are
people who believe in animism (as panpsychists argue) in fact less likely to have anthropocentric attitudes and also
less likely to harm the environment? What about people who adopt some relational or holistic view of the world, as
advocated by deep ecologists? How do they act toward nature compared to those who adopt a more individualistic
and atomistic worldview? These questions about the relations among various belief systems and behaviours look no
different in kind from the sorts of questions that social scientists regularly ask.
Of the major philosophical theories on the origin of environmental crisis, Lynn White’s is the only one to have been
empirically tested by social scientists. The net result of these studies so far has been “inconclusive”, especially when
education, sex, age and social class are also factored in (Shaiko 1987, Greeley 1993, Woodrum and Hoban 1994,
Eckberg and Blocker 1996, Boyd 1999). Moreover, like their philosophical counterparts, environmental sociologists
often take the psycho-behavioural thesis of non-anthropocentrism for granted. Some of the best-known and most
widely used survey instruments in the field are also problematic. Riley Dunlap and collaborators developed many
years ago the “New Environmental Paradigm” (NEP) scale, to measure pro-environmental attitudes (Dunlap and van
Liere 1978). That scale, and its later revisions (see Dunlap et al. 2000), is problematic precisely because it explicitly
uses indicators of beliefs in anthropocentrism to measure the presence of un-environmental attitudes, thus assuming
in advance that anthropocentric beliefs are harmful to the environment. But whether that is so should be settled by
empirical investigation rather than by an act of a priori stipulation in survey design.
Despite the fact that there is a striking common underlying structure between White’s theory and the other major
theories discussed above, no sociological studies so far have been done on the other theories, nor on the common
underlying psycho-behavioural thesis of non-anthropocentrism and its effects. This presents an opportunity for
interdisciplinary collaborations among philosophers and social scientists. Many tools and methods well established
in the social sciences can justifiably be adapted for use in research on environmental philosophy, giving the subject
an empirical or even experimental turn. Such work may stimulate new ideas about the origins of our environmental
pathologies, and for testing the extent to which belief systems and worldviews actually drive attitudes and
behaviours. As long as empirical facts are relevant to philosophical and ethical thought, adoption of social science
methods will be a means of keeping our theorising in touch with the motivations and behaviours of the people we
are trying to describe and influence.
Similar points about the role of empirical investigations can also be made about theorizing over a range of other
problems, including drought, the preservation of biodiversity, and climate change. While it has become
commonplace to refer to the present era as “the age of terror”, there is increasing agreement across the entire globe
that the world is facing chronic and unprecedented environmental problems, many of them of human origin. Indeed,
the United States military, responding to an albeit speculative report on abrupt climate change prepared for the
Pentagon by the Global Business Network (see Schwartz and Randall 2003, in the Other Internet Resources section
below), have declared that the problems of adjustment to climate change constitute a far more severe threat to
national and international security than does terrorism itself. Drought, changing weather patterns, the expected
burden of caring for environmental refugees, the effects of consumerism, and the health decline associated with
various forms of pollution are continuing and major problems for human beings themselves (see Shue 2001, Sagoff
2001, Thompson 2001), and raise crucial issues about environmental justice (see Shrader-Frechette 2002). At the
same time, the continuing destruction of natural environments and the widespread loss of both plant and animal
species poses increasing problems for other forms of life on the planet. In facing these problems, there will likely be
great opportunities for co-operation and synergy between philosophers and both natural and social scientists.
Like many other important and interesting questions, no single discipline could claim sole ownership of those just
raised about the origins of modern environmental crisis and the quandaries we now face, the relation between
environmental problems and social injustice, and the vexed question of how human beings should relate to the
natural environment in their pursuit of happiness and well-being. The move away from armchair speculation to link
up with a wider community of inquiry may be inevitable not only in environmental ethics but in all areas of practical
philosophy.

12
Acknowledgments
The authors are deeply grateful to the following people who gave generously of their time and advice to help shape
the final structure of this entry: Clare Palmer, Mauro Grün, Lori Gruen, Gary Varner, William Throop, Patrick
O'Donnell, Thomas Heyd, and Edward N. Zalta. Also, thanks to Dale Jamieson for comments on the version revised
and updated in January 2008.
Bibliography
Redacted—for an extensive bibliography (172 references), see the online article.

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