The Human Toll Of The War 'To End All Wars'
"The human cost of World War I was enormous. More than 9 million soldiers and an estimated 12 million 
civilians died in the four-year-long conflict, which also left 21 million military men wounded."
"Many of them were missing arms, legs, hands, genitals or driven mad by shell shock," says historian Adam Hochschild. "But there was also a human cost in a larger sense, in that I think the war remade the world for the worse in every conceivable way: It ignited the Russian Revolution, it laid the ground for Nazism and it made World War II almost certain. It's pretty hard to imagine the second world war without the first."