What important things happened from the year 1870-1940?

From 1870 to 1940, several significant events shaped global history, including the unification of Germany in 1871, which altered the balance of power in Europe. The Industrial Revolution continued to transform economies and societies, leading to urbanization and significant technological advancements. World War I (1914-1918) resulted in massive geopolitical changes and set the stage for World War II, which began in 1939. Additionally, the Great Depression in the 1930s had a profound impact on economies worldwide, leading to widespread unemployment and social upheaval.