Of the almost 11 million Africans who came to the Americas between 1500 and 1870, two-thirds came to Spanish America and Brazil. Over four centuries, Africans and their descendants--both free and enslaved--participated in the political, social, and cultural movements that indelibly shaped their countries' colonial and post-independence pasts. Yet until very recently Afro-Latin Americans were conspicuously excluded from narratives of their hemisphere's...