The Problem of Evil. "How can there be a omniscient, omnipotent, and beneficent god when there is so much suffering in the world?" Either god is incompetent or malicious.
"Theodicy" is a term used to describe philosophical attempts to justify or explain the existence of evil or suffering in the world despite the belief in a benevolent and all-powerful deity. It often involves exploring questions about the nature of God, human free will, and the problem of evil.