World War I killed 40 million people (soldiers and civilians). World War II killed 100 million people:

 The Cold War between 1945 and 1990 killed another 100 million people. This is likely why we are isolationist today mostly because if there was another Draft they would have to draft both women and men 18 to 26 years old now. We live in surrealistic Crazy insane times that ONLY compare in insanity to 1930 to 1945 or 1950 when the Hydrogen Bombs were first Tested and after Hiroshima and Nagasaki were nuked into oblivion then.