A historical account traces the establishment, organization, and eventual dissolution of Jesuit missions in Paraguay, detailing their founding, evangelizing efforts among indigenous peoples, the economic and social systems of the mission settlements, daily religious life, and conflicts with colonial authorities. The narrative blends travel recollection and eyewitness description of landscapes and abandoned mission sites with biographical sketches of missionaries and meditations on motives and outcomes. It weighs whether Jesuit governance improved indigenous welfare, acknowledging both the devotion and the controversies that attended the order’s work.