Reply #42: peanuts. Mao had him by a factor of 3.

[ChairmanAgnostic]

Mao promoted a cult, a religion of his own. He was the great leader, he was the religious icon, people prayed to his image and read from his little red book as though it were a bible.

But the worst of all historical killers? The catholic church. In terms of percentage or raw numbers, they killed, tortured, eradicated and assassinated more unhappy inhabitants from the face of this planet than any other organization or individual.
Entire tribes destroyed. Entire civilizations killed off and enslaved. eleven crusades which caused the deaths of many millions. The inquisition, the dark ages, - the list is endless. Only today, as the Vatican is trying to find its dentures, have they refrained from mass murder.