How did Pan-African thought spread through North America in the twentieth century? The proliferation of Black liberation movements is explored in a new book called "Cross-Border Cosmopolitans: The Making of a Pan-African North America" written by McGill University historian Wendell Nii Laryea Adjetey (Nii Laryea Osabu I, Atrékor Wé Oblahii kè Oblayéé Mantsè).