The problem of evil, also known as the problem of suffering, is the philosophical question of how to reconcile the existence of evil and suffering with an omnipotent, omnibenevolent, and omniscient God. There are currently differing definitions of these concepts. The best known presentation of the problem is attributed to the Greek philosopher Epicurus.
Besides the philosophy of religion, the problem of evil is also important to the fields of theology and ethics. There are also many discussions of evil and associated problems in other philosophical fields, such as secular ethics and evolutionary ethics. But as usually understood, the problem of evil is posed in a theological context.