The reason Cronus ate his children was because he was afraid that one day his children would grow strong and try to overthrow him. Hope this helps.
Totalitarianism! This is essentially a dictatorship in which the power of the government (typically a single person and a few trusted advisors) have absolute power over the people.
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They ended up colonizing North America for different economic reasons. Spain colonized America because they were searching for gold and silver. They did find a lot of gold and silver when they conquered the Aztec and Inca Empires. France colonized North America because of the great amount of furs they found there.