In an earlier post entitled God and Time I mentioned that despite the serious liabilities entailed by the idea that God does not have complete knowledge of the future - that is, he doesn't know what choices free beings will make in their future - it is nevertheless an attractive idea because it provides the theist with an answer to a difficult apologetic question. That question arises in the course of attempts to give a reply to the problem of evil.
Let's look at that problem first and then the problematic question that it raises.
No doubt the most troubling objection to the existence of a God as traditionally construed by theists is the existence of evil in the world. Whether people are persuaded by the presence of evil that the existence of a God is unlikely or whether they employ evil as an a posteriori rationalization for the disbelief they've already embraced, it is a difficult challenge for theists and has been since at least the time of the ancient Greeks.
One thing that needs to be said about the problem is that despite its power to instill and sustain doubt, the reality of evil does not constitute a proof against God's existence. Its philosophical strength, its advocates argue, is that it makes the existence of God unlikely.
The traditional argument takes the form of a dilemma:As I said a moment ago, this is not a proof that God doesn't exist or that he's not all-powerful or good because it's possible to slip between the horns of the dilemma and reply that God could be both able to prevent evil and wants to prevent evil but for some reason chooses to permit it to occur.
Most anti-theists grant this as a theoretical possibility, but, they argue, the existence of evil makes the existence of an all-powerful all-loving God improbable. After all, they ask, what kind of God would allow evil to exist if he could prevent it? What loving father would stand by and do nothing as his child suffers if he could do something to stop it?
No reason the theist can come up with, the skeptic argues, can justify the suffering of an innocent child. Thus, it is unlikely that the world is the product of the kind of God theists believe in.
Before we consider the classical theistic response to this challenge we should lay a bit more groundwork.
First, we need to understand that to say that God is omnipotent is not to say that he can do anything at all. Rather, it is to say that God can do anything that it is logically possible to do. This means that it is beyond God's power to do anything which entails a contradiction of some sort.
For example, it is not within God's power to create a world in which it would be true to say that God did not create it, or, it is not within his power to bring it about that you and I, or God himself, never existed. These are contradictory states of affairs and therefore logical impossibilities.
A theist, though, might object here that God is not constrained by the laws of logic, that God really can make a square circle if he wishes, but if one wants to argue this way he has to recuse himself from arguing at all and retreat into a private mysticism where nothing much can be said about God. To abandon the constraints of logic is to put God beyond the ability of men to reason about him, or to know anything about him, because anything that one could say about God could be both true and false at the same time, which is incoherent.
The second thing we should mention is that there are two basic kinds of evil. There is evil that emerges from human volition, and there is evil which results from natural causes like disasters, disease, famine, etc. The first we may call moral evil and the latter we'll call natural evil.
Having established this, tomorrow we'll look at why God might allow moral evil to exist, given that all sides agree that it's within his power to prevent it. We'll take up the question of natural evil in part III.
