World War I affected the worldview of many Americans in a negative manner, showing that America helped out tremendously in the last year of the war. But as a result of the creation of the League of Nations and Wilson's push towards United States involvement in world affairs, many felt that we as a country wanted to focus more on domestic issues and thus the United States was never involved in the League as the Senate failed to ratify the treaty. Athletes became popular during this time period as the media and people glorified them to an extent with the example of Babe Ruth especially, along with people like Charles Lindbergh becoming a American legend after flying solo nonstop from New York to Paris with his own aircraft "Spirit of St Louis". The media put them on a pedestal as a result.
They were shock after they found that 11 million of people were kill along with 6 millions jews
<u>The Great Migration</u> was the movement of six million African-Americans out of the rural Southern United States to the urban Northeast, Midwest, and West that occurred between 1916 and 1970.
Which produced many changes in the US.
Cultural changes
Demographic changes
Discrimination and working conditions
Integration and segregation
<u>And politically:</u> <u><em>In 1965</em></u><u>,</u> Congress passed the Voting Rights Act, which became a critical marker in African-American history.
<u><em>Within months</em></u> of passing the Voting Rights Act, Congress passed a new immigration law, replacing the Johnson-Reed Act of 1924.
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I believe the answer is: Euclid and Pythagoras.
Euclid alexandria was a famous mathematicians who is regarded as the father of Geometry and phytagoras was known for developing the phytagoras formula to measures sides of triangles. Their accomplishments were really crucial because it is still used to calculate correct measurement in modern day architecture and engineering.
While you didn't really provide the "following" as the comment above me states, in general, the advantage of secondary sources of primary ones is that they perhaps provide a more objective or even just a broader view on a certain topic. While a primary source of the American civil war would be a letter written by a soldier, a secondary source would be a book that describes more letters taken together and discusses possible information regarding them.
