The principal author, Peter Turchin, doubled down on his 2020 prediction a few years later in the book "Ages of Discord". Unfortunately, perhaps because it had

The principal author, Peter Turchin, doubled down on his 2020 prediction a few years later in the book "Ages of Discord". Unfortunately, perhaps because it had a bit of math involved, it didn't have the impact we might wish it had: http://peterturchin.com/ages-of-discord/ http://peterturchin.com/ages-of-discord/