Answer:
Some of the causes to McCarthyism was World War 1, The Bolshevik Revolution in Russia, and Self-proclaimed anarchists' mailing bombs to prominent Americans. Some of the effects were that Millions of Americans were forced to take loyalty oaths, Activism and labor unions goes into decline, Many people become afraid to speak out on public issues, and Anti-communism continues to drive foreign policy.
The importation of African slaves into the Americas effectsly affected the Americas. In the United States, the acquaintance of slaves drove with a conviction of a "mediocre" race which penetrated southern culture for a long time. As a result of subjugation, numerous southerners couldn't envision a general public where whites and blacks lived as equivalents. It prompted major financial contrasts between the North and South.
What I can tell you is that the states were divided on whether or not to fully slave or not slave. The compromise was a draft that said a thin line across a certain state would balance out the number of slave state to the number of free states.
If we're talking about pre_revolution, it's because Britain believed that the soon-to-be-Americans were merely renting the land and that they had no right to expand. However, the manifest destiny bit of American's hearts wanted to expand as populations grew and conditions became unbearable. Also, there was the lure of riches in the west, eventually... help at all??
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