In the Bible in the book of Genesis, evil entered the world when the serpent tricked Adam and Eve into eating the fruit from the Tree of Knowledge of Good and Evil which had been forbidden. This event is known as the Fall, and is responsible for the suffering and imperfect nature of the world. (Not everyone takes the story literally, and even many Christians see the Genesis story as an allegory or metaphor, possibly for a fall taking place at a spiritual level.)
Among the atheist community, there is liberal denial that evil exists. Many atheists have no universal moral law, and some insist that good and evil are seen as just personal opinions, varying from day to day.
- Genesis 3:6-7