One of the silliest things I’ve seen in a long time—the Voluntary Human Extinction Movement. These are folks who think the human race should stop procreating until we die out and the biosphere can recover.
There was a community here in Enfield that practiced a small-scale version of the VHEMT. They were called the Shakers. They didn’t procreate (or have sex at all), so they died out, which is not exactly a shocking development for a religious community that can only gain members through adoption or conversion. The village is still there, and it has some beautifully constructed buildings on it. The Great Stone Dwelling is particularly impressive. It’s made of granite and was designed to house 150 people. The Catholics bought Shaker Village and then resold it, and now it’s mostly private residences sitting on prime real estate overlooking Mascoma Lake.
Human reproduction, tied to our most basic biological urge, is pretty much impossible to suppress, and any organization dedicated to the eradication of it has no chance of convincing more than just a statistically insignificant number of followers.