Alan Bullock was knighted in 1972, becoming Sir Alan Bullock and in 1976 was made a life peer as Baron Bullock, of Leafield in the County of Oxfordshire. Born in 1914, he studied at Oxford University and served as a research assistant to Winston Churchill while the prime minister was writing his A History of the English-Speaking Peoples. Bullock was a history fellow at New College, Oxford and helped found St Catherine's College, Oxford. He is best known for his book Hitler: A Study in Tyranny (1952) which was the first comprehensive biography of Adolf Hitler and influenced many other major biographies of Hitler. Bullock died in 2004.