What affect did World War 2 have on the world?

Answer 1

One of the main events was the Holocaust, in which over 6.2 million Jews were killed and tortured in the Nazis' concentration camps. 'Experiments' (that I won't go into, but be sure that is was terrible) were preformed on them, and only a fraction survived.

Another problem was the bombing of Hiroshima and Nagasaki, by order of Harry S. Truman, President. He ordered the nuclear bombs Little Boy to be dropped on Hiroshima, and Fat Man to be dropped on Nagasaki. It still haunts the History of Japan. The bombings, which were the first actual use of nuclear weapons in history, were developed in the Manhattan Project, which tested the weapons.

Still, the trenches and cliff-bunkers and tank-busters are standing on the beaches of Normandy, France from the invasion of D-Day. D-Day got it's name from the files on it, which didn't exactly specify the date.