Abstract: Papers of labor historian and political activist Roger Horowitz, documenting his activities as a student at the Fieldston School, the University of Chicago, and the University of Wisconsin-Madison. Information is particularly strong concerning South Africa, Central America, and various socialist movements. Also included is Horowitz's collection of oral history interviews with members of the United Packinghouse Workers of America (UPWA) which he made in 1987 in the course of completing research for a dissertation. A supplement to the UPWA Oral History Project, these interviews seek to learn more about the ethnicity, religious influences, and social characteristics of packinghouse workers' communities, circa 1920-1960.