Behave is Robert Sapolsky’s comprehensive exploration of the multifaceted influences on behavior. The book delves into how genetics, neurobiology, endocrinology, and environmental factors interact to shape human actions. Sapolsky combines insights from neuroscience, psychology, anthropology, and sociology, illustrating that behavior cannot be reduced to simple causes but is the result of a complex interplay of factors acting at different levels—from immediate brain reactions to long-evolved cultural contexts. The work is notable for its accessible synthesis of science and its philosophical reflection on free will, responsibility, and the nature of human behavior.