There are Harvard grads, free thinkers, feminists, abolitionists, well-to-do people who want to go write poetry and live on a farm and cook and laugh and have a good time. As they themselves described it, it was an "inward facing" community. They were focusing on making a better existence for themselves, which I think is also the driving force of 20th century communalism in the US, the thought being that the world is corrupt, and we're going to build this little garden of innocence.

There are two instances I studied in which a community moved, amazingly, into an preexisting village built by other, earlier communalists. The Rappites were a German millenarian sect I mostly leave out of the story, even though they are fascinating, because they're focused on salvation and retreating from the world, as opposed to transforming it, like the other groups I write about.

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.

The thought was, 'We're going to go to California, where the soil is black and ten feet deep, and there are no rocks, and there's gold in the hills.' The West becomes the surface onto which people project their fantasies, where once the future had been the place they projected their fantasies. So it's not just the war that ends the utopian communities, but what follows.

There are Harvard grads, free thinkers, feminists, abolitionists, well-to-do people who want to go write poetry and live on a farm and cook and laugh and have a good time. As they themselves described it, it was an "inward facing" community. They were focusing on making a better existence for themselves, which I think is also the driving force of 20th century communalism in the US, the thought being that the world is corrupt, and we're going to build this little garden of innocence.

Utopian fiction is really boring. I had to read a lot of it, and it's not that much fun. But they're fascinating to me as historical documents. Cabet [Icaria's founder and author of the utopian novel, Travels in Icaria], is writing in the 1830s, and his idea of the perfect society reveals a lot about his time. But his book is uniquely bad.

They're people who probably imagine that they would have had a better time in the past. I wouldn't imagine you'd encounter a lot of black people saying 'Oh, the '50s, that was when America was great.' It's very dangerous because the past was imperfect, and you can't go back anyway.