 The free will defense does not, in most formulations, attempt a complete solution to the problem of evil. It deals only with moral evil, and although we have seen that this category covers more than might at first be supposed, it certainly does not appear that all of the sorrows and failures of the world can be gathered under it. Even if the free will defense succeeds then, there will remain a residuum of natural evil to be addressed. It may, however, be questioned whether the defense succeeds even in the limited project it undertakes. One criticism of it raises a question about the relation between creaturely freedom and God’s activity as creator. J. L. Mackie has argued that if God is truly all-powerful, he ought to have been able to create creatures who possessed free will, but who never did wrong (1955, 209). If that were possible, then we would have had a universe free of moral evil, even though it contained creatures with free will. Perhaps the sinful populace that presently inhabits the world would have lost out on such a scenario: maybe God would have had to create an entirely different crowd. Still, moral evil would have been banished, and the condition of the world doubtless vastly improved. But could God have exerted such control over creation? Proponents of the free will defense have tended to think not. In order for God to provide creatures with meaningful freedom, they argue, God must relinquish control over how that freedom is exercised. Were it not so, libertarian freedom would be destroyed: our decisions and actions would not finally be up to us, but would instead be manipulated by God (Plantinga 1974, 41–42; Flint 1998, 84–90). Even if they were exempt from natural causation, they would still be determined by God’s will, and so would be unfree. Indeed, the argument runs, it would be logically impossible for God to create creatures possessed of libertarian freedom, and at the same time have the operations of their will fall under his creative fiat. Now it is not usually considered a failure of omnipotence for God to be unable to do what is logically impossible. We need not, therefore, relinquish the claim that God is all-powerful. Rather, the theist concludes, Mackie is simply mistaken in thinking such a God could create free creatures with a guarantee that they would never sin.