Ww1 and rise of big dictators during inter war period
World War I (1914–1918) caused massive death, destruction, and instability in Europe, with the Treaty of Versailles punishing Germany. In this chaos, Hitler in Germany, Mussolini in Italy, Stalin in the USSR, and Lenin in Russia rose to power. Their nationalism, fascism, and communism destabilized the world, paving the way for World War II.