Atheist isn't really the right word because they tended to believe in some sort of Enlightenment, capital 'N' Nature kind of god. But these were people who in their times were criticized as infidels.

They [Oneida people] didn't want to fix problems one at a time. If someone invited them to a feminist convention, their answer would have been, 'In the new world women will have total equality, so lets spend our energy creating that whole new world.' And to their credit, the women at Oneida probably had far greater practical equality than what any of the women gathered at Seneca Falls experienced in their lifetimes.

But if you'd only ever lived in small wooden house in the middle of wilderness, it sounded much better. Especially because it provided intense community, and these people lived in incredible isolation.

The secular utopians basically said the exact same thing, they just took the Bible out of the equation. The religious and the secular groups recognized each other as fellow travellers. They exchanged newsletters and asked each other questions like, "What's a good soup pot to use if you're making dinner for 800 people?" They had these practical connections.

They [Rappites] were moving from Southern Indiana to Pennsylvania, where they had originally settled when they came from Germany. They were looking for someone who wanted to buy a pre-built town, which wouldn't have been appropriate for any kind of normal settlement. That's when Robert Owen [Welsh industrialist and utopian socialist] buys the village and founds New Harmony.

The religious and irreligious are agreeing with each other almost all the time. Their rhetoric is the same, and their plans are the same. Through slightly different interpretations, they all think the same thing is going to happen, that the Earth is going to be perfected and that humans are going to do the work of perfecting it.

These weren't college kids on acid. They were preachers, and bankers, and farmers, and the salt of American society subscribing to ideas that now seem so wild to us. These people had the most radical visions of what the future could be. And this was happening in an era we don't typically associate with sexual experimentation, or communism, or things like that.