Determined: A Science of Life without Free Will

Robert Sapolsky, whose earlier work Behave examined the biology of human behavior, follows that argument to its logical conclusion: if every decision we make is the product of a specific chain of biological causes, from genes to hormones to childhood environment to the cultural context of the preceding moment, then free will as commonly understood is an illusion. Determined is not a philosophical thought experiment but a scientific argument, working through neuroscience, genetics, endocrinology, and chaos theory to dismantle the last refuges of voluntary agency, then asking what follows for how we think about responsibility and punishment.

Kaleo Griffith narrates with the engaged clarity that complex science writing requires, keeping Sapolsky's wide-ranging synthesis accessible without oversimplifying the evidence. His performance gives the material its proper weight, conveying both the rigor of the argument and the genuine moral stakes of its implications. At just under fourteen hours, Determined is a challenging, important work of science communication that benefits from Griffith's authoritative delivery.