8 Moreover this duty of expiation is laid upon the whole race of men since, as we are taught by the Christian faith, after Adam's miserable fall, infected by hereditary stain, subject to concupiscences and most wretchedly depraved, it would have been thrust down into eternal destruction. This indeed is denied by the wise men of this age of ours, who following the ancient error of Pelagius, ascribe to human nature a certain native virtue by which of its own force it can go onward to higher things; but the Apostle rejects these false opinions of human pride, admonishing us that we "were by nature children of wrath" ( Ephesians ii, 3). And indeed, even from the beginning, men in a manner acknowledged this common debt of expiation and, led by a certain natural instinct, they endeavored to appease God by public sacrifices.
Source: Miserentissimus Redemptor (Vatican.va)