Many historians have seen a radical shift in W.E.B. Du Bois’ political activities in his later years. Following World War II, the evolution of his political perspective led to his ouster from the National Association for the Advancement of Colored People, where he had worked for years, and the Justice Department’s indictment of him for failure to register as a foreign agent. In this extensively researched study, Gerald Horne shows that Du Bois’ later activities were the culmination of his lifelong concerns, which Du Bois resolutely followed despite the threats of Cold War McCarthyism. In investigating Du Bois’ last 20 years, Horne shows how the confluence of Cold War anticommunism and attempts to discredit the civil rights and anticolonial movements influenced the evaluation of Du Bois’ activity. The recently opened papers of W.E.B. Du Bois and previously unexamined papers of the NAACP are among the new sources Horne examined for his study.