The most evil series of events in human history occurred in the 13th Century. It was the birth of a government led by the infamous Khans of Mongolia. Its enormity can only be understood by both the enormous levels of death and destruction and the brutal depravity of how it was carried out.
Every libertarian should know the story, and one of the best ways to hear it is from Dan Carlin’s podcast, Hardcore History. His five part series called Wrath of the Khans does an excellent job describing the horrific details.