were Northern Europeans of Protestant faith and Western Africans who were forced to immigrate because of slavery. This pattern shifted in the mid to late 19th century for both the Western and Eastern regions of the United States. There was a large influx of immigration from Asia in the Western region, while Eastern and Southern European immigrants settled more in the Eastern United States. Once the demographics of immigration were changing, there were policies put in place to reduce immigration to exclude individuals of certain ethnicities and races. Congress passed the Chinese Exclusion Act of 1882 to stop the inflow of Chinese immigrants. Then in 1917, Congress passed the Immigration Act; this act had prevented most immigration of non-North Western Europeans because it tested language understanding. This act was followed by the Emergency Immigration Act of 1921, that placed a quota on immigration which used the rate of immigration in 1910 to mirror the immigration rate of all countries. The Emergency Immigration Act of 1921 had helped bring along the Immigration Act of 1924 had permanently established the National Origins Formula as the basis of U.S. immigration policy, largely to restrict immigration from Asia, Southern Europe, and Eastern Europe. According to the Office of the Historian of the U.S. Department of State, the purpose of the 1924 Act was "to preserve the ideal of U.S. homogeneity" by limiting immigration from Southern and Eastern Europe. At the time the U.S. had been recognized by many as the global leader in codified racism. The National Socialist Handbook for Law and Legislation of 1934–35, edited by the lawyer Hans Frank, contains a pivotal essay by Herbert Kier on the recommendations for race legislation which devoted a quarter of its pages to U.S. legislation, including race-based citizenship laws, anti-miscegenation laws, and immigration laws. Adolf Hitler wrote of his admiration of America's immigration laws in Mein Kampf, saying: In the 1960s, the United States faced both foreign and domestic pressures to change its nation-based formula, which was regarded as a system that discriminated based on an individual's place of birth. Abroad, former military allies and new independent nations aimed to de-legitimize discriminatory immigration, naturalization and regulations through international organizations like the United Nations. In the United States, the national-based formula had been under scrutiny for a number of years. In 1952, President Truman had directed the Commission on Immigration and Naturalization to conduct an investigation