Industrial Revolution: The Industrial Revolution was a major shift in global economic and social conditions during the late 18th and early 19th centuries. It marked the transition from an agrarian-based economy to one dominated by industry and manufacturing.
World War I: World War I (1914-1918) was a global conflict primarily centered in Europe. It was triggered by various factors including militarism, nationalism, imperialism, and alliances between different nations.
Cold War: The Cold War was a state of political tension between the United States (and its allies) and the Soviet Union (and its allies) from 1947 to 1991. Although it did not involve direct military conflict between these superpowers, it influenced global politics and led to proxy wars in various regions of the world.