At the Heart of the Borderlands is the first book-length study of Africans and Afro-descendants in the frontiers of Spanish America. While people of African descent have formed part of most borderlands' histories, this study recognizes and explains their critical contribution to the formation of frontier spaces. Lack of imperial control coupled with Spain's desperation for settlers and soldiers in frontier areas facilitated the social mobility of Afro-descendants. This need allowed African descendants to become not just members of borderland societies but leaders of it as well. They were essential actors in helping to shape the limits of the Spanish empire. Africans and Afro-descendants built, opposed, and shaped Spanish hegemony in the borderlands, taking on roles that would have been impossible or difficult in colonial centers due to the socio-racial hierarchy of imperial policies and practices.

By the early 1700s, the vast scale of the Spanish Empire led crown authorities to rely on local institutions to carry out their political agenda, including religious orders like the Franciscan mission of Santa Rosa de Ocopa in the Peruvian Amazon. This book follows the Ocopa missions through the eighteenth and early nineteenth centuries, a period marked by events such as the indigenous Juan Santos Atahualpa Rebellion and the 1746 Lima earthquake. Caught between the directives of the Spanish crown and the challenges of missionary work on the Amazon frontier, the missionaries of Ocopa found themselves at the center of a struggle over the nature of colonial governance. Cameron D. Jones reveals the changes that Spain's far-flung empire experienced from borderland Franciscan missions in Peru to the court of the Bourbon monarchy in Madrid, arguing that the Bourbon clerical reforms that broadly sought to bring the empire under greater crown control were shaped in turn by groups throughout the Americas, including Ocopa friars, the Amerindians and Africans in their missions, and bureaucrats in Lima and Madrid. Far from isolated local incidents, Jones argues that these conflicts were representative of the political struggles over clerical reform occurring throughout Spanish America on the eve of independence.

At the Heart of the Borderlands is the first book-length study of Africans and Afro-descendants in the frontiers of Spanish America. While people of African descent have formed part of most borderlands' histories, this study recognizes and explains their critical contribution to the formation of frontier spaces. Lack of imperial control coupled with Spain's desperation for settlers and soldiers in frontier areas facilitated the social mobility of Afro-descendants. This need allowed African descendants to become not just members of borderland societies but leaders of it as well. They were essential actors in helping to shape the limits of the Spanish empire. Africans and Afro-descendants built, opposed, and shaped Spanish hegemony in the borderlands, taking on roles that would have been impossible or difficult in colonial centers due to the socio-racial hierarchy of imperial policies and practices.