You're confusing "great" with "good". They are not the same.
Genghis Khan was a great man. You cannot unify a nomadic people and conquer a shitload of Asia and not be a great man. Given that under his leadership, the Mongols literally reduced the carbon footprint of the whole planet based upon the amount of people they killed, you could easily claim he was not a "good" man.
Genghis Khan was a great man. You cannot unify a nomadic people and conquer a shitload of Asia and not be a great man. Given that under his leadership, the Mongols literally reduced the carbon footprint of the whole planet based upon the amount of people they killed, you could easily claim he was not a "good" man.