Augustinian Theodicy is a way of trying to explain why bad things happen in the world, even though God is all-loving and all-powerful. The idea comes from a Saint called Augustine, who said that evil in the world is because of sin. He argued that without sin, there wouldn't be bad things in the world, and that it's our own fault that those things exist. In other words, the bad things in the world are because people do bad things and God is still good.