Agriculture plays a crucial role in the rise and development of civilizations, since it allows for there to be a "food surplus"--meaning that people other than farmers can spend time and effort developing new skills and practicing new trades.
The 1920s were a period of dramatic changes. More than half of all Americans now lived in cities and the growing affordability of the automobile made people more mobile than ever. Although the decade was known as the era of the Charleston dance craze, jazz, and flapper fashions, in many respects it was also quite conservative. At the same time as hemlines went up and moral values seemed to decline, the nation saw the end of its open immigration policy, the revival of the Ku Klux Klan, and the trial of a Tennessee high‐school teacher for teaching evolution.
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Muhammad's first revelation instructed all Muslims to follow only Allah and shun other gods.
Christopher Columbus and his fellow colonists enslaved the Native inhabitants of the West Indies.
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