Answer:
Theory by Darwin.
Explanation:
Andrew Carnegie and John D. Rockefeller remembered as the rich men who owned larger companies. Both supported the theory of social Darwinism. Social Darwinism is a theory related to the survival of the fittest in society. The theory given by Charles Darwin, which points to evolution. Wealth is in the hands of a few people due to economic struggle. Money ends up remaining in the hands of those who grow their wealth by using their skill and strength.
To stop the spread of communist after World War II, the United States established a policy known as the Truman Doctrine.
Motivations for colonization were to extract gold and silver from the Americans, to stimulate the Spanish economy and make Spain a more powerful country.Spain was also aiming to convert all native Americans to Christianity.
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