Probably the most-cited argument against the existence of a theistic God is the logical form of the problem of evil, which argues that the existence of an all-good and all-powerful God is logically incompatible with the existence of evil because an all-good God would want to prevent evil and an all-powerful God could prevent evil, and yet evil exists. From this, it follows that God is not all-powerful, not all-good, or more likely does not exist at all. There could be a world in which God exists, or there could be a world in which evil exists, but there can be no world in which both God and evil exist. Since it’s empirically evident that evil exists, God does not.

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