Social pressure and assigned roles can turn ordinary people into perpetrators of evil.
Imagine you are in a video game where you must apply strict rules to other players. At first you are fair, but if everyone else abuses, you might start too. Zimbardo shows with the prison experiment that roles and power can change behavior. It's like when a classmate becomes team leader and suddenly becomes harsh.
Zimbardo does not claim we are all hidden monsters. He shows that situational forces can be stronger than character. For instance, a gentle parent can become aggressive behind the wheel if surrounded by honking drivers. It is not about malice, but about context. The next step is to understand how we can recognize these pressures before they change us.
Why it matters This book helps us understand how abuses of power can arise in groups, from schools to organizations.