Cornelius Jansenius

Cornelius Jansenius (1585–1638) was a Dutch Catholic theologian and Bishop of Ypres whose posthumously published masterwork, the Augustinus, set off one of the most consequential theological controversies in early-modern Catholicism. Drawing on an exhaustive reading of Augustine of Hippo, he argued that fallen human nature is incapable of resisting grace when God bestows it, and equally incapable of obeying God's commands without it — a position critics held was indistinguishable from Calvinist predestinarianism. He died of plague in 1638 before the Augustinus could be printed, never witnessing the storm it provoked. The movement that grew from his work, Jansenism, profoundly shaped French Catholic piety, moral theology, and politics for over a century, particularly through the community of Port-Royal. His teachings were condemned by papal authority, rendering his legacy deeply contested within Roman Catholicism.