Robert Sapolsky is a researcher in neurobiology and primatology, and professor of biology, neurological sciences, and neurosurgery at Stanford University. He is the author of highly relevant books such as Why Zebras Don’t Get Ulcers and Determined. In my assessment, his work is important because an accurate understanding of the deep, neurobiological underpinnings that give rise to human behavior provide us with a much clearer sense of explanatory causes. This clearer sense of causal mechanisms offers us greater power in actual predictability, grounded in physics and biology, not the delusions of a supernatural deity.