LyrArc Article Gist
Foreign born population after a series of restrictive Immigration Acts dropped from 15% in 1890 to 12% in 1930, to 5% in 1970. The effort of 1924 Act was to make the southern and eastern European immigration that jumped by 1924 to 41% of total to much lower numbers.

A look at the Immigration Act of 1924 under the Coolidge administration sponsored by senators from Washington state and Pennsylvania, Albert Johnson and David Reed, by Chishti and Gelatt in MPI. It shows the prejudices of the early Europeans from one country to Europeans from other countries that followed, after the British, the Germans, the Irish, the Italians and Polish, as the immigration waves shifted to Eastern and southern Europe in the period between 1880 and 1920. During this period Southern and Eastern European immigrants that made up 16% of the population reached 41%. In 1882 Chinese immigration to the US came under the Chinese Exclusion Act restricting it. The Dillingham Commission of 1911 stated the merits of different racial types with northern European and western European preferred to southern and eastern European. Still only 1% of the immigrants entering America were turned back between 1880 and 1924. 

The 1917 Immigration Act set up an "Asian Barred Zone" that included Japan, a head tax of $8 on immigrants, requiring proof of read and writing of all immigrants, vetoed by president Woodrow Wilson. The Emergency Quota Act of 1921 set the first quotas at 358,000. Under the Immigration Act of 1924 it was revised to 165,000. President Hoover asked for strict consular restrictions so that between 1929 and 1945 immigrant numbers fell below 100,000 a year.