“From spending my decades thinking about behavior and the biological influences on it, I'm convinced by now free will is what we call the biology that hasn't been discovered yet. It's just another way of stating that we're biological organisms determined by the physical laws of the universe.”

American academic, neuroscientist, and primatologist

Robert Morris Sapolsky is an American academic, neuroscientist, and primatologist. He is the John A. and Cynthia Fry Gunn Professor at Stanford University and a professor of biology, neurology, and neurosurgery. His work focuses on neuroendocrinology, especially the biology of stress. He is also a research associate with the National Museums of Kenya, reflecting a career that links laboratory science with long-term study of primates and their behavior.