That's what Pelagius and Harold say. First, let me say that it flatly contradicts Scripture. Surely I was sinful at birth, sinful from the time my mother conceived me. Instead of being born neutral, as Pelagius maintains, the Bible makes clear that we are conceived and born into sin and as sinners. Second, the Pelagian view is contrary to our experience.
Most Christian parents can see that sin exists in even the smallest of children.
I experienced this first-hand a number of years ago while we were still living in Wisconsin. I went to my garden to pick some tomatoes and cucumbers. I saw tracks and the imprints of little shoes leading to a neighbor's house. I knocked at the door, explained what happened, and asked the mother who answered the door to question her children. A couple of minutes later my door-bell rang.