"The problem

An important statement of the problem of evil, attributed to Epicurus, was cited by the Scottish philosopher David Hume in his Dialogues Concerning Natural Religion (1779): “Is [God] willing to prevent evil, but not able? then is he impotent. Is he able, but not willing? then is he malevolent. Is he both able and willing? whence then is evil?” Since well before Hume’s time, the problem has been the basis of a positive argument for atheism: If God exists, then he is omnipotent and perfectly good; a perfectly good being would eliminate evil as far as it could; there is no limit to what an omnipotent being can do; therefore, if God exists, there would be no evil in the world; there is evil in the world; therefore, God does not exist. In this argument and in the problem of evil itself, evil is understood to encompass both moral evil (caused by free human actions) and natural evil (caused by natural phenomena such as disease, earthquakes, and floods)."