Mary Baker Eddy believed that "Things perceived to be 'evil' including sin, sickness, disease, and death were not real; they are all just beliefs." and that evil was an illusion
St. Augustine believed that evil and suffering is not God fault because God gave humans free will. So God became distant from the world, therefore releasing evil into the world, and we are still punished today because we were present in Adams sperm
St. Irenaeus and Jhon Hick believed that humans need to exercise their freewill by making choices, even if they go wrong. We need to learn what is wrong to know what is right.
They thought that God created a world with evil in it so we could tell good from bad.