I.A. Richards was an influential 20th century English literary critic known for developing the concept of four kinds of meaning in a text. According to Richards, the total meaning of a text is a blend of sense, feeling, tone, and intention. Sense refers to the literal or descriptive meaning. Feeling is the author's emotional attitude. Tone is the author's attitude toward the audience. Intention considers the author's purpose in writing. Richards explored these concepts in influential works like Practical Criticism.