Original sin is only a poor stimulator of behaviour change. It's easy to understand that it seems rather unfair to blame a new-born for the major problems that humanity faces after several centuries of technological progress. That also applies to all those natural peoples, who lived in harmony with their environment, where the concept of Earth Overshoot Day did not apply at all. In this article it is argued that insights from applied psychology can help to pay off the debts in terms of behavioral change.