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As well as giving us the concept of zero, Indian mathematicians made seminal contributions to the study of trigonometry, algebra, arithmetic and negative numbers among other areas. Perhaps most significantly, the decimal system that we still employ worldwide today was first seen in India
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The Southern economy was based on agriculture. Crops such as cotton, tobacco, rice, sugar cane and indigo were grown in great quantities. These crops were known as cash crops, ones that were raised to be sold or exported for a profit.
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It was primarily "the recognition of treaty rights" and "Native American self-government" that prompted the Native American Civil Rights Movement, since many Natives were not being respected at all by the US government.
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The era gave rise to Langston Hughes, Zora Neale Hurston, and "The Cotton Club." The term refers to Harlem becoming the center of culture during the 1920s.
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