Originally posted by jaden101
. The British Empire FTW.
What he said, the British empire at it's peak was the largest in history with the Mongol Empire being second.
To answer the exact question of the thread it would be the USSR. But Rome held much bigger sway over the world during it's time than the USSR did during it's. It's also estimated that at it's peak, one fourth of the world's population lived under Roman rule, a greater percentage than lived under Moscow's.