Robert M. Sapolsky

Spent over thirty years splitting his time between a Stanford laboratory and a troop of wild baboons in Kenya, measuring what social rank does to a primate's bloodstream.

Why Zebras Don't Get Ulcers explains why a stress response evolved for two minutes of sprinting is ruinous when it runs for thirty years of mortgage. Behave works up from what happened one second before an action, to a minute, an hour, a childhood, a species, and takes seven hundred pages to arrive at how little of it we choose.

Determined goes further and argues against free will altogether. Philosophers have pushed back hard on that one. The biology underneath is not seriously disputed.