He believed that humans could choose between good and evil. His beliefs were challenged by Augustine who held firmly to his belief that a person was tainted by original sin and could not be considered righteous without the grace of God. Augustine won and Pelagius was excommunicated in AD 418.
In the 16th century, Martin Luther and John Calvin, Protestant reformers, believed that original sin and the harmful desire for sex involved a loss of free will except to sin. In the 17th century, the Catholic Church believed in original sin and recognized that the gift of grace was available. The church offered baptism as a path of grace. According to the Catechism of the Catholic Church, concupiscence (temporal consequences of sin) remains in those who are baptized. (https://simplycatholic.com/concupiscence-our-inclination-to-sin/
Jacobus Arminius and John Wesley at different times believed in prevenient grace, which deviated from the beliefs of Augustine and John Calvin. Arminius (1559-1609) presented this theological interpretation of the gift of grace. He believed that prevailing grace came from the Holy Spirit. âThe Holy Spirit precedes human participation or acceptance in salvation. It inevitably works, restoring and healing human freedom of will; only then does it work in a resistible way in the work of salvation. ((https://digitalcommons.andrews.edu/dissertations/1670/)
In the 18th century, John Wesley, a leader of the Methodist movement, wrote and preached on prevenient grace. He believed that humans inherit original sin, but God grants prevenient grace to all.