If I could travel back in time and change only one event in history....

If I could travel back in time and change only one event in history I would travel to 1914 and prevent the assassination in Sarajevo of the Archduke Ferdinand of Austro-Hungaria. By saving the life of one man World War One could have been prevented. Imagine what would have happened with no world war. The assassination was the first domino which knocked over all the other dominos of the 20th Century. There would have been no WWI and no WWII, no Russian revolution, no Soviet Union, no Mussolini, no Hitler, no Stalin, no holcaust, no Spanish Civil War, no Communist China, no Cold War, no Korean War, no Vietnam War, no atom bombing of Japan. The world would not have been perfect, the big European empires would still have had colonies in Africa and Asia where people were mistreated by racist bullies but it would have been a very different world.