This ethnographic study is a revisionist view of the most significant and widely known mission system in Latin America—that of the Jesuit missions to the Guaraní Indians, who inhabited the border regions of Paraguay, Argentina, and Brazil. It traces in detail the process of Indian adaptation to Spanish colonialism from the sixteenth through the early nineteenth centuries. The book demonstrates conclusively that the Guaraní were as instrumental in determining their destinies as were the Catholic Church and Spanish bureaucrats. They were neither passive victims of Spanish colonialism nor innocent “children” of the jungle, but important actors who shaped fundamentally the history of the Río de la Plata region. The Guaraní responded to European contact according to the dynamics of their own culture, their individual interests and experiences, and the changing political, economic, and social realities of the late Bourbon period.

The thirty Guaraní missions of the Río de la Plata were the largest and most prosperous of all the Catholic missions established throughout the frontier regions of the Americas to convert, acculturate, and incorporate indigenous peoples and their lands into the Spanish and Portuguese empires. But between 1768 and 1800, the mission population fell by almost half and the economy became insolvent. This unique socioeconomic history provides a coherent and comprehensive explanation for the missions' operation and decline, providing readers with an understanding of the material changes experienced by the Guaraní in their day-to-day lives. Although the mission economy funded operations, sustained the population, and influenced daily routines, scholars have not focused on this important aspect of Guaraní history, primarily producing studies of religious and cultural change. This book employs mission account books, letters, and other archival materials to trace the Guaraní mission work regime and to examine how the Guaraní shaped the mission economy. These materials enable the author to poke holes in longheld beliefs about Jesuit mission management and offer original arguments regarding the Bourbon reforms that ultimately made the missions unsustainable.

In this volume, Elman R. Service describes the Guarani culture at the time of Spanish colonization in Paraguay and explores the reasons why the encomienda system resulted in the rapid acculturation of the Guarani in this region.

In the 17th and 18th centuries Spain and Portugal contested control of the disputed Rio de la Plata borderlands. The Jesuit missions among the Guarani played an important role in regional conflict through the provision of manpower for campaigns and supplies. However, regional conflict and particularly the mobilization of the mission militia and the movement of soldiers on campaign had demographic consequences for the populations of the missions such as the spread of contagion. This study documents regional conflict in the Rio de la Plata, the militarization of the Jesuit missions, and the demographic consequences of conflict for the mission populations.