In The War Machines, Danny Hoffman considers how young men are made available for violent labor both on the battlefields and in the diamond mines, rubber plantations, and other unregulated industries of West Africa. Based on his ethnographic research with militia groups in Sierra Leone and Liberia during those countries recent civil wars, Hoffman traces the path of young fighters who moved from grassroots community-defense organizations in Sierra Leone during the mid-1990s into a large pool of mercenary labor.

Hoffman argues that in contemporary West Africa, space, sociality, and...