Final answer:
Original sin is the Christian belief that all humans are born with a sinful nature inherited from Adam and Eve's disobedience in the Garden of Eden. It is seen as the reason for the existence of evil in the world. Only through God's grace and redemption can humans be freed from the effects of original sin.
Step-by-step explanation:
Original sin is the Christian belief that all humans are born with a sinful nature inherited from Adam and Eve's disobedience in the Garden of Eden. According to St. Augustine, this sin has corrupted human nature and separated humanity from God.
Original sin is seen as the reason for the existence of evil in the world. It is believed that only through God's grace and redemption, which was brought by Jesus Christ, can humans be freed from the effects of original sin and restored to a right relationship with God.
It is important to note that the concept of original sin is specific to Christianity and is not recognized in other religious traditions.