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There are three major reasons why people immigrate to other countries: work, love and war. In the late 1800s, immigrants in the United States tried to assimilate with the current populations by learning to speak English and adopting current American cultures and traditions. This is known as the process of Americanization. The idea is that immigrants end up sharing the "American" values, customs and beliefs. The idea behind Americanization is that people who share common values and ideals will contribute to a common cause or goal. This is also known as patriotism.
1] Isolationism - a policy of remaining apart from the affairs or interests of other groups, especially the political affairs of other countries.
Intervention - the action or process of intervening.
Imperialism - a policy of extending a country's power and influence through diplomacy or military force
2] Building the Panama Canal, 1903 - 1914. President Theodore Roosevelt oversaw the realization of a long term US goal - a trans-isthmian canal. Throughout the 1800s, American and British leaders and businessmen wanted to ship goods quickly and cheaply between the Atlantic and Pacific coasts.