This document discusses culture change and its various causes and processes. It defines culture change as occurring when a society accepts and regularly uses a new invention or discovery. Culture change can happen through discoveries, diffusion of ideas between societies, acculturation when dominant cultures influence weaker ones, or revolution. The main processes of culture change discussed are unconscious invention, intentional innovation in response to needs, and various patterns of diffusion like direct contact, intermediate contact, and stimulus diffusion. The document also examines how culture change allows societies to adapt to their environments. Finally, it outlines some major types of culture change occurring in the modern world like commercialization, religious change, and political/social change brought by expanding Western societies.