Source: http://necrometrics.com/pre1700a.htm
(Possibly) The Twenty (or so) Worst Things People Have Done to Each Other:
Rank Death Toll Cause Centuries
1) 63 million Second World War 20C
2) 40 million Mao Zedong (mostly famine) 20C
3) 40 million Genghis Khan 13C
4) 27 million British India (mostly famine) 19C
5) 25 million Fall of the Ming Dynasty 17C
6) 20 million Taiping Rebellion 19C
7) 20 million Joseph Stalin 20C
8) 19 million Mideast Slave Trade 7C-19C
9) 17 million Timur Lenk 14C-15C
10) 16 million Atlantic Slave Trade 15C-19C
11) 15 million First World War 20C
12) 15 million Conquest of the Americas 15C-19C
13) 13 million Muslim Conquest of India 11C-18C
14) 10 million An Lushan Revolt 8C
15) 10 million Xin Dynasty 1C
16) 9 million Russian Civil War 20C
17) 8 million Fall of Rome 5C
18) 8 million Congo Free State 19C-20C
19) 7½ million Thirty Years War 17C
20) 7½ million Fall of the Yuan Dynasty 14C
What other people say:
"The destruction of the Indians of the Americas was, far and away, the most massive act of genocide in the history of the world." David E. Stannard, American Holocaust: the Conquest of the New World (1992) page x
"The Mohammedan Conquest of India is probably the bloodiest story in history." Will Durant, The Story of Civilization: I - Our Oriental Heritage (1935) page 459. (see alsothese)
"Little did we guess that what has been called the century of the common man would witness as its outstanding feature more common men killing each other with greater facilities than any other five centuries together in the history of the world." Winston Churchill
