Ya I was going to say this is a very famous (like day 2 or 3 in almost all psych 101 classes, after the Stanford prison experiment and the electric shock test) and is widely replicated. The Asch conformity study is the most famous. These three studies tell you all you need to know about totalitarianism and the nature of most people.

For those who dont know, the stanford prison experiment was a bunch of people role playing a prison. They had to stop it because the "guards" were beating the inmates after a few days. The electric shock study had participants administer shocks to another "subject" when they answered a question wrong. The second subject (the one getting the shocks) was really a researcher or recording who'd scream in agony and beg them to stop, but there would be another researcher telling the subject administering the shocks to keep going. Every time they shocked they increased the voltage. They wanted to see how far people would go when an official figure (researcher) told them to. Almost everyone kept going past the point where the "shockee" complained of heart problems and even stopped responding. It is actually terrifying.

Another interesting study, the dark room study. They put random people (girls and guys) in a locked room that was totally 100% dark.. but they had night vision cams to watch them.

In almost every group people started hooking up... random people who didn't know eachother and couldn't see eachother in a dark room full of strangers.

Ya I was going to say this is a very famous (like day 2 or 3 in almost all psych 101 classes, after the Stanford prison experiment and the electric shock test) and is widely replicated. The Asch conformity study is the most famous. These three studies tell you all you need to know about totalitarianism and the nature of most people.