William L. Langer

William Leonard Langer (March 16, 1896 – December 26, 1977) was an American historian, intelligence analyst and policy advisor. He served as chairman of the history department at Harvard University. He was on leave during World War II as head of the Research and Analysis Branch of the Office of Strategic Services. He was a specialist on the diplomacy of the periods 1840–1900 and World War II. He edited many books, including a series on European history, a large-scale reference book, and a university textbook. Early life Born in South Boston, Massachusetts, he was the second of three sons of recent German immigrants, Charles Rudolph and Johanna Rockenbach. His elder brother, Rudolf Ernest Langer, became a mathematician and his younger brother, Walter Charles Langer, a psychoanalyst. When William was only three, his father died unexpectedly, leaving the family in difficult circumstances. Nevertheless, his mother, who supported the family by working as a dressmaker, made education a priority for her children. Education and career After studying at the Boston Latin School, Langer attended Harvard University.