Trakakis also maintains that some of the major theodicies that have been offered by theists (e.g., the free will theodicy, the soul-making theodicy) fail to explain why God would permit various types of evil, particularly 'natural evil' or suffering brought about by natural processes (e.g., natural disasters). However, he does believe that the free-will theodicy may succeed in explaining at least some kinds of moral evil. On this issue, Joel Thomas Tierno has argued against Trakakis that human freedom alone can not account for all instances of moral evil, given the scale on which we find it distributed in the world.