Say what you will about the founder of the Mongol Empire; the man got results. You have to hand it to someone capable of killing off 11 percent of the world’s population. Also, a 2003 study found that as many as 8 percent of the men living in territories of the former Mongol empire bear Y chromosomes characteristic of the Mongol ruling house. That means approximately 16 million men can likely claim descent from Khan. The man certainly made his mark on the world.