What If? by Robert Cowley, John Keegan, Stephen E. Ambrose

7.5 out of 10

The Plague, The Persians, Alexander the Great, The Romans, The Muslims, The Mongols, The Aztecs, The Spanish Armada, The American Revolution, Napoleon, The American Civil War, World War I, The Nazis, The Japanese, D Day, VE Day and The Chinese Civil War all could easily have had different fates.   A change in military tactics, some different weather conditions, or better health for a few individuals could have drastically altered the modern world.