Who Created Evil?

Moral evil is properly understood as an absence rather than something that actually exists. It’s a privation of moral goodness in a created person, whether purely spiritual (angels) or human.

To be clear, God is not responsible for moral evil—or physical evil for that matter. The devil and his angelic associates brought moral evil into the created world by their initial and irreparable choice against their creator. God created them good, but by rebelling against their creator they became evil and thus definitively chose self-exclusion from God, which is hell (CCC 391-95). Similarly, human beings who definitively exclude themselves from God also choose hell (CCC 1033-37).