In Christian theology, synergism is the position of those who hold that salvation involves some form of cooperation between divine grace and human freedom. It stands opposed to monergism, a doctrine most commonly associated with the Lutheran and Reformed Protestant traditions, whose soteriologies have been strongly influenced by the North African bishop and Latin Church Father Augustine of Hippo (354–430). Lutheranism, however, confesses a monergist salvation and synergist damnation (see below). Synergism is upheld by the Orthodox and Roman Catholic Churches, and by the Methodist and Pentecostal traditions of Protestantism. It is an integral part of Arminian theology.
Synergism and semipelagianism each teach some collaboration in salvation between God and man, but semipelagian thought teaches that the beginning half of faith is an act of human will. The Council of Orange (529), Lutheran Formula of Concord (1577), and other local councils each condemned semipelagianism as heresy.
Synergism, the teaching that there is "a kind of interplay between human freedom and divine grace", is an important part of the salvation theology of the Roman Catholic Church.
The Catholic Church rejects the notion of total depravity: they hold that, even after the Fall, man remains free, and human nature, though wounded in the natural powers proper to it, has not been totally corrupted. In addition, they reject the idea that would "make everything the work of an all-powerful divine grace which arbitrarily selected some to be saved and some to be damned, so that we human beings had no freedom of choice about our eternal fate".