Robert M. Sapolsky - Behave The Biology Of Huma... Apr 2026

It begins with the amygdala (fear and aggression) and the frontal cortex (logic and impulse control). Sapolsky describes the constant tug-of-war between these regions that determines whether we pull a trigger or extend a hand.

In his monumental work, , Robert Sapolsky provides a breathtakingly comprehensive look at why we do the things we do. Rather than offering a single explanation, Sapolsky explores human behaviour through a "nested" timeline—ranging from the seconds before an action to the millions of years of evolution that shaped our species. The Chronology of Behavior Robert M. Sapolsky - Behave The Biology of Huma...

Sapolsky deconstructs myths about testosterone and oxytocin . He argues that testosterone doesn’t cause aggression but rather amplifies pre-existing social tendencies to maintain status, while oxytocin—often called the "cuddle hormone"—actually increases "us vs. them" mentalities by making us nicer to our "In-group" and more hostile toward "Out-groups." It begins with the amygdala (fear and aggression)