Reginald Horsman (October 24, 1931) is an English historian and Professor of History at the University of Wisconsin at Milwaukee.
He was born in 1931 in Leeds, Yorkshire, England to Alfred William Horsman and Elizabeth Thompson. He married Lenore Lynde McNabb on September 3, 1955, and the couple have two daughters, Janine and Mara, and one son, John.
Prof. Horsman received his BA and MA degrees from the University of Birmingham in 1952 and 1955, respectively, and was awarded his PhD from Indiana University Bloomington in 1958. He became Professor of History at the University of Wisconsin at Milwaukee in 1958. He became a naturalized U.S. citizen in 1965.
Prof. Horsman is a member of the Organization of American Historians, Society of America Historians and the Society for Historians of the Early American Republic. He is also a fellow of the Guggenheim Fellowship (1965).
He is best known for his book, The Causes of the War of 1812, which was first published in 1962. His other history works include: Expansion and American Indian Policy, 1783-1812 (1967); The Frontier in the Formative Years, 1783-1815 (1970); Race and Manifest Destiny: The Origins of American Racial Anglo-Saxonism (1981). He has also authored several biographies, including Matthew Elliott, British Indian Agent (1964) and Frontier Doctor: William Beaumont, America’s First Great Medical Scientist (1996).