The Monroe Doctrine had a long lasting impact on the foreign policy of the United States. Presidents throughout history invoked the Monroe Doctrine when intervening in foreign affairs in the Western Hemisphere. Here are some examples of the Monroe Doctrine in action.
1865 - The U.S. government helped to overthrow Mexican Emperor Maximilian I who was put in power by the French. He was replaced by President Benito Juarez.
1904 - President Theodore Roosevelt added the "Roosevelt Corollary" to the Monroe Doctrine. He used the doctrine to stop what he called "wrongdoing" in several countries. It was the beginning of the U.S. acting as an international police force in the Americas.
1962 - President John F. Kennedy invoked the Monroe Doctrine during the Cuban Missile Crisis. The U.S. placed a naval quarantine around Cuba to prevent the Soviet Union from installing ballistic missiles on the island.
1982 - President Reagan invoked the Monroe Doctrine to fight communism in the Americas including countries such as Nicaragua and El Salvador.
For the first question the natural world can control where people live by the physical features and geographic location.
With urban planning, we were able to plan how water systems should work, how to stop diseases from spreading, and how to get rid of garbage. This had a deep, positive impact on cities.
They brought different things with them, like different beliefs and religions. They also brought different technologies as in tools.
