Behave: The Biology of Humans at Our Best and Worst

Robert Sapolsky chronologically charts the biological triggers of human behavior, starting with the neurobiology of the amygdala and frontal cortex seconds before an act. He expands the timeline back to hormonal surges in the hours prior, adolescent brain development, and fetal environments. The narrative moves into genetics and ancient evolutionary pressures that hardwired the human capacity for tribalism and altruism. By examining the chemical signals behind aggression and cooperation, he explains how context dictates whether a person pulls a trigger or offers a helping hand.

This book serves researchers and students of neurobiology and sociology who want to move beyond single-cause explanations for human conduct. Readers finish the text with a technical vocabulary for discussing how stress hormones and cultural inheritance interact to influence moral decision-making. It provides a framework for understanding the limitations of free will and the biological mechanisms that drive social hierarchies. Those interested in the intersection of criminal justice and science use these findings to reconsider how society assigns blame and merit.