What is the doctrine of original sin. Is it something we should accept? Are we born sinners? How did sin get into the world? The doctrine of original sin is that Christian teaching that Adam introduced sin and death into the world, and that we were born into this world of sin and death. Now, more than ever, those of us with convictional belief, who really and truly want to know the word of God and who believe in absolute truth, we need to gather with like-minded believers because the sin and death Adam introduced into our world has grown and produced the fruit of a secular progressive worldview.