Most people still dont know
The communication and ongoing relationship between America and other world nations is known as <em>Foreign Policy.</em> <em>The president of the United States as head of the Executive Branch is responsible for the U.S. Foreign Policy. </em> In order to help him with these responsibilities the US President has the Secretary of State. This person acts as the equivalent of a Minister of Foreign affairs. Also the U.S. Ambassadors are responsible for the diplomatic relations with each country the U.S.has relations with. They are also part of the Foreign Policy area of the Executive Branch of Goverment ultimately led by the President of the United States.
The level of immigration between 1930 and 1945 is most directly related to the Great Depression and World War ll. Due to the poor economy with little opportunity for better living standards, very few people were willing to immigrate to the USA.
I think it is the Enlightenment. I may be wrong