Explain the difference between the Irenaeus and Augustine theodicies (solution to the problem of the evil)?

Their understandings of natural evil is what differtentaites the Irenaeus and Augustine theodicies. Irenaeus believes that natural evil is necessary in the world so that we as humans have something to overcome which can better us to a moral standard closer to God.Augustine believes that natural evil is the sole fault of humanity’s god given free will, a direct consequence of the fall. When humanity fell, we broke the relationship between god and man; man and nature; and man and woman. which caused natural evil to flood throughout the world.