According to the book of Genesis in the Bible, evil entered the world when the serpent tricked Adam and Eve into eating the fruit from the forbidden Tree of Knowledge of Good and Evil. This event is known as the Fall, and is responsible for the suffering and imperfect nature of the world. (Some people do not take the story literally, and some 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.
Christianity does not leave this ambiguity.
- ↑ Genesis 3:6-7