Oscar Handlin (29 September 1915 – 20 September 2011) was an American historian. As a professor of history at Harvard University for over 50 years, he directed 80 PhD dissertations and helped promote social and ethnic history, virtually inventing the field of immigration history in the 1950s. Handlin won the 1952 Pulitzer Prize for History for The Uprooted (1951). Handlin's 1965 testimony before Congress was played an important role in passage of the Immigration and Nationality Act of 1965 that abolished the discriminatory immigration quota system. Source: Wikipedia (en)