One hundred years ago, the U.S. Congress enacted the most notorious immigration legislation in American history. Signed by President Calvin Coolidge, the Immigration Act of 1924 dramatically reduced immigration from eastern and southern Europe and practically barred it from Asia.
How the law did this, however, was somewhat subtle: a quota. Lawmakers calculated how many immigrants from each European country were residing in the United States in 1890 and then took 2% of that number. Only that many newcomers could be admitted from any particular country each year. Before the end of the 19th century, the number of immigrants from outside western and northern Europe was still relatively small – meaning their 2% quotas would be minuscule.
