This is a video of a TED talk given by Philip Zimbardo, who’s one of the most famous American psychologists of the last few decades.
When I was in high school, I was fascinated by his Stanford prison experiment and Stanley Milgram’s obedience experiment. Milgram was dead, but I somehow found a way to email Zimbardo. He even emailed back, a brief but friendly hello.
While I don’t like a lot of the TED mentality, when they manage to get people like Zimbardo instead of, uh, Seth Godin, they really strike gold.
(Please note this is a seriously unsettling video and has some graphic content.)