The Monroe Doctrine is the best known U.S. policy toward the Western Hemisphere. Buried in a routine annual message delivered to Congress by President James Monroe in December 1823, the doctrine warns European nations that the United States would not tolerate further colonization or puppet monarchs.
Well its basically when two states are arguing about something and it goes overboard
Better transport so you could see their better, machines were doing jobs so you could hang more, gave you something to talk about (new inventions)
The constitution declared the independence of the 13 colonies from Great Britain and explained the transgressions placed against them by King George the third
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