As one listener points out, we might not have carrot cake today if Germans weren't forced to bake with ersatz materials during World War I. This little girl might have had to settle for chocolate instead. Fox Photos/Getty Images hide caption

What If World War l Had Never Happened?
Without World War I, the woman's suffrage movement might have been slower to gain traction. Paul Thompson/Getty Images hide caption
Vladimir Lenin in 1900. In our counterfactual history, his career as the producer of the musical Pins and Needles is only a few years away. Hulton Archive/Getty Images hide caption
World War I was when the old world became the new. Here, a German cavalryman wears a gas mask and carries a long spear or pole, from two different ages of war. Topical Press Agency/Getty Images hide caption
This illustration from an Italian newspaper depicts Gavrilo Princip killing Archduke Francis Ferdinand on June 28, 1914. Achille Beltrame/Wikimedia Commons hide caption