In her book A Distant Mirror: The Calamitous Fourteenth Century, Barbara Tuchman writes about a peasant revolt in 1358 that began in the village of St. Leu and spread throughout the Oise Valley. At one estate, the serfs sacked the manor house, killed the knight, and roasted him on a spit in front of his wife and kids. Then, after ten or twelve peasants violated the lady, with the children still watching, they forced her to eat the roasted flesh of her husband and then killed her. That is class warfare. Arguing over the optimum marginal tax rate for the top one percent is not.