Thomas Jefferson gave land to settlers in exchange for harvested crops, cut taxes and encouraged colonists. He also reduced the government's debt
The three G's, God, Glory, and Gold. They could spread their beliefs and society (God) to whomever they encountered, making them "less savage," they would gain glory just for conquering new lands and expanding their empires, and they could achieve riches by taking the lands they found for their own personal use and resource collection.
The main cause of WWII is the same as that in the first world war, which was mainly allegiances; the Nazi party of Germany invaded Poland, which brought Britain into the war, and then continued to expand across Europe. The primary nations in the allied forces were: Great Britain, France, Poland, USA, Norway, Canada, the USSR, and Denmark, and the primary nations in the Axis Powers were: Germany, Italy, Romania, Bulgaria, and Japan. The main effect of the WWII was the Cold War, a period of about 50 years where the USA and USSR were making threats about nuclear war, as well as the destruction of most of Europe. Another effect was the prevention of Germany to control a Navy. The war ended on September 2nd, 1945, with the surrender of Japan and Germany earlier that year.
Theodore Roosevelt asserted American power with the Monroe Doctrine.
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