Why is 1989 considered the most historically important year since 1945?

What was the purpose of the mounds built by the Plum Bayou culture? What major events are considered the lifeblood of manifest destiny? How much does a cannon cost and where can I purchase one? Sources of word in Business English? Why is S Korea and N Korea separated? Why did Larry hoover go to jail? What all does it cost to manufacture a plastic bottle? What was George Kennan's proposed policy toward the soviet union? What are the charateristics of a modern drama? What did the Yayoi introduce into Japanese culture? What happens to the soldiers of the light brigade? Screaming soaring seeking sky fires of flowers flying high eastern art from ancient time? Where is the Otis Orchards Library in Otis Orchards located? The main battles of the Spanish American war occurred in which parts of the world? How did the early settlers get to Ohio? Who gave the twenties the nickname of the jazz age? Are there any spanish Greeks? Why does southwest Asia have a lot of oil? Who were the big 3 philosophers in rome? What exercise equipment was in the Romans baths?