Link: Science’s Answers to Human History

I’m tempted to sigh “Ah, those scientists and their ability to chart just about anything,” but I don’t think it wise to dismiss such efforts. You just never know where the breakthrough will come from. [Nature magazine has a report](http://www.nature.com/news/human-cycles-history-as-science-1.11078) on the latest effort which points to a peak in violence here in the USA in 2020:

Cycles of Violence in American History