Introduction: Du Bois, Afro-American and American political thought -- Corporate industrialization, collectivism, and the new intellectuals: historical context in the formation of Du Bois's thought -- Philadelphia Negro and the consolidation of a worldview -- Science and progress: the unity of scholarship and activism -- Stratification, leadership, and organization: the role of the black elite -- Three confusions about Du Bois: interracialism, Pan-Africanism, socialism -- Du Bois's "double consciousness": race and gender in progressive-era American thought -- "Tradition" and ideology in black intellectual life -- From historiography to class ideology.