What makes ordinary people do evil things? It was a question that long fascinated the psychologist Philip Zimbardo, who died in October. Zimbardo was best known for the controversial Stanford prison experiment, in which he created a simulated prison in the basement of a university building and recruited volunteers to act as prisoners and guards. This week, we explore how Zimbardo came to create one of psychology's most notorious experiments – and inadvertently became the poster child for the human weaknesses he was trying to study.

We're bringing Hidden Brain to the stage in San Francisco and Seattle in February 2025! Join our host Shankar Vedantam as he shares seven key insights from his first decade hosting the show. Click here for more info and tickets.

There's a tradition around many Thanksgiving dinner tables that's as consistent as stuffing and pumpkin pie: the family stories that get told year after year. Sometimes these stories are funny; sometimes they make us roll our eyes. No matter how we feel about these tales, we rarely pause to consider how they shape who we are and how we view the world. This week, we talk to psychologist Robyn Fivush about the profound impact that family stories can have on our lives.

If you enjoyed today's conversation, here are more Hidden Brain episodes you might like:

Healing 2.0: Change Your Story, Change Your Life

The Story of Your Life

Rewinding & Rewriting

Thanks for listening!

Neuroscientist Doug Fields was on a trip to Europe when a pickpocket stole his wallet. Doug, normally mild-mannered, became enraged — and his fury turned him into a stranger to himself. This week, we revisit a favorite 2020 episode about the secret logic of irrational anger.

This is the final episode in our Emotions 2.0 series. If you missed any of the episodes in the series, you can find them here in this podcast feed, or at hiddenbrain.org. And if there's someone in your life who you think would enjoy this series, please tell them about it. Thanks for listening!