Archaeologists have discovered fossil evidence of a caveman having eaten an entire rattlesnake, fangs and all. Even in these polarizing times, most people would agree that meals getting easier to swallow since the Stone Age represents a positive change. But not everyone.

Paul Ehrlich, the infamous overpopulation alarmist who bet economist Julian Simon that a growing population would lead to resource scarcity (and lost), is still fearmongering. Instead of overpopulation, his latest book project decries, bizarrely, what he considers to be the pathetic size of modern jawlines. Along with coauthor Sandra Kahn, an orthodontist, he argues that modern postindustrial lifestyles have led humans to develop smaller jaws with a higher likelihood for crooked teeth due to dental overcrowding.