6 Random Coincidences That Created The Modern World | Cracked.com
http://www.cracked.com/article_17298_6-random-coincidences-that-created-modern-world.html

The stuff they say about time travel is right. You go back in time and change one little thing, and suddenly the future is full of Nazis and dinosaurs. If you go back through history, you find that time and time again the huge changes that shape our world today all hinged on some utterly random coincidence. Change it, and the entire course of history changes with it.