Julius Nyerere was one of the greatest African thinkers and leaders of the twentieth century, but until now, no one has looked at how his time in the African Association (AA), before he left for Europe, connected him to a whole world of black thought and shaped his intellectual biography. After demonstrating the lessons Nyerere learned about African unity from the AA and figures like James Aggrey, it will demonstrate how he remolded and used these ideas, and how the strands of both practical pan-Africanism and Ethiopianist-inspired redemptive pan-Africanism can be seen throughout his career. It explores how his ideas of umoja shaped both domestic and international policies in postcolonial Tanzania including the relationship between religion and politics. It then examines how Nyerere wrestled with ideas of African identity, unity, and Africanness (Uarikfa) and highlights the inherent tensions between projects of territorial nationalism and political pan-Africanisms such as African nationalism.