(plane whirring) - [Roger Berkowitz] There were federal and regional elections at the time, and if you look at Hitler's speeches during the campaigns, he would say things like, "We are a majority."

He was never a majority, and he would come up with some argument that they won.

He was giving them a coherent narrative.

We are winning.

We are gonna change Germany.

We are gonna change the world.

And the movement is growing and it's stronger because of you and your undying loyalty to me.

(tense music) - [Narrator] The Nazis translated the propaganda lies of the movement into a functioning reality.

The ideal subject was not the convinced Nazi, but people for whom the distinction between fact and fiction no longer existed.

A most cherished, virtuous loyalty to the leader who, like a talisman assures that ultimate victory of lie and fiction over truth and reality.

- Arendt saw this.

She was there.

She was living there, and so many of her friends said, "Oh, well, he's just crazy.

"He's just making things up."

And "Don't worry about him.

"He can't win.

"He's just creating fantasies."

But fantasies are sometimes what we want.

And especially at times of economic, cultural, social, and political despair, people, they were lonely.

They were needy of meaning and belonging, and that's what Hitler was giving people.

(uneasy music) - [Narrator] The Nazi movement recruited their members from this mass of indifferent people whom all other parties had given up as too apathetic or too stupid for their attention.

The result was that the majority of their membership consisted of people who never before had appeared on the political scene.

(people cheering) - I think she came up with these ideas when she was looking at what this mass society would provide people.

It would provide them with the impression that they're not alone anymore, and there is a party giving them an idea that they are part of something really big.

(people shouting)