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The reason there was slavery in the United States is because there was more work to do than people to do it. The North's population grew quicker than the South's, so they could become "moral"quicker
Answer: Japan
Explanation: On December 7, 1941, Japan staged a surprise attack on Pearl Harbor, decimating the US Pacific Fleet. When Germany and Italy declared war on the United States days later, America found itself in a global war.
Answer:
the emergence of capitalism, European imperialism, efforts to mine coal, and the effects of the Agricultural Revolution. Capitalism was a central component necessary for the rise of industrialization.