When King Menes united the kingdoms of Upper and Lower Egypt by establishing a succession of rulers from the same family, he founded the first Egyptian dynasty.
He miscalculated the size of the Earth by more than half.
Prince Prosperos character describes him to be B. Selfish
The first reason was the Bolshevik Revolution that happened in 1917 and the second major reason was the strikes organized by the workers in the United States. The government was afraid of the chance that communism would take hold in the United States and that is the reason for the raids and prosecution of the individuals who were thought to be anti-American.
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By not uniting all of South America I hoped that helped ;)