In Emergent Masculinities, Ndubueze L. Mbah argues that the Bight of Biafra region’s Atlanticization—or the interaction between regional processes and Atlantic forces such as the slave trade, colonialism, and Christianization—between 1750 and 1920 transformed gender into the primary mode of social differentiation in the region. He incorporates over 250 oral narratives of men and women across a range of social roles and professions with material culture practices, performance traditions, slave...