Immigration and Nationality Act of 1965
 

Immigration and Nationality Act of 1965 (Hart-Celler Act, INS, Act of 1965, Pub.L. 89-236) abolished the National Origins Formula that had been in place in the United States since the Immigration Act of 1924. It was proposed by United States Representative Emanuel Celler of New York, co-sponsored by United States Senator Philip Hart of Michigan and heavily supported by United States Senator Ted Kennedy of Massachusetts.

By changing long-held immigration policies, the act resulted in new immigration from non-European nations which changed the ethnic make-up of the United States. Immigration doubled between 1965 and 1970, and doubled again between 1970 and 1990. The most dramatic effect was to shift immigration from Europe to Asia and Central and South America.