W.E.B. Du Bois was the first Black American to earn a PhD from Harvard, co-founded the NAACP, and wrote The Souls of Black Folk — one of the most influential works in African American intellectual history. Then he kept going left. By his nineties, he had joined the Communist Party, renounced his American citizenship, and moved to Ghana, where he died on the eve of the March on Washington. The arc of his radicalization spans the entire twentieth century.

This episode traces Du Bois from his Massachusetts childhood through the Talented Tenth philosophy, the rivalry with Booker T. Washington, the founding of the NAACP, and the late-life turn to communism and Pan-Africanism that made him an exile from the country he had spent decades trying to improve.

• Du Bois's New England upbringing, his Harvard PhD, and The Souls of Black Folk ...