Where does a conscience and guilt come from?

If a person feels guilty when he harms another, or even fails to reciprocate kindness, he is more likely not to harm others or become too selfish. In this way, he reduces the chances of retaliation by members of his tribe, and thereby increases his survival prospects, and those of the tribe or group. As with any other emotion, guilt can be manipulated to control or influence others. As a highly social animal living in large groups that are relatively stable, we need ways to deal with conflicts and events in which we inadvertently or purposefully harm others. If someone causes harm to another, and then feels guilt and demonstrates regret and sorrow, the person harmed is likely to forgive. Thus, guilt makes it possible to forgive, and helps hold the social group together.