Hmm, and the alternative is that a certain amount of evil is necessary for the ultimate good... which is somewhat horrifying, as it implies something analogous to a utility monster.
I don't think it's quite the same thing as a utility monster - rather, it would mean simply that, for some reason, the world is better with all the suffering it contains. This is possible but it hardly seems probable. This is why, although the problem of evil is not a knock-down refutation of theism (it could be better to have all the suffering), it seems to me a pretty good reason to be dubious of theism if you don't have good other grounds for thinking it to be true.
@Plotinus, the exact phrase "Son of God" is only used once in the OT and is in Daniel which random pointed out, but most of the time the term was used was as a mock to mock Jesus based on what he had said. "If you are the Son of God the he should do what they asked of him which was totally not God had planned for him. His enemies knew what he had said about himself and used those words to either mock or to indict him. The resurrection showed he was the Son of God.
I don't entirely agree with this. First, you're right that "son of God" is frequently used in the Gospels by Jesus' enemies - but they're not generally quoting Jesus' words back at him. In fact it's the enemies who are presented as applying the title "son of God" to him - Jesus is almost never presented as using that title. For example, in Matthew 2 the devil twice challenges Jesus to prove that he is the son of God, but Jesus hasn't made any such claim.
Second, this idea of enemies mocking the righteous man for being "son of God" and attacking him for it is straight from the wisdom literature that I quoted in my previous post, notably Wisdom of Solomon 2, where the "ungodly" talk about the righteous man in exactly the same way. So this was a standard literary motif which didn't have anything to do with "claims" made by Jesus or anyone else - it was a standard way of describing how enemies might mock a righteous person. Again, it doesn't have any metaphysical overtones. The righteous man in Wisdom of Solomon 2 isn't supposed to be "the son of God" in the Christian sense of the term, he's just a righteous man.
Third, I'm fairly sure (but I may be wrong) that the notion that Jesus' resurrection showed him to be son of God is not a New Testament idea. Matthew 27:54 suggests that it was Jesus' death, not his resurrection, that did this. John 20:31 suggests that it was Jesus' entire career that showed him to be son of God. Romans 1:4 suggests that Jesus' resurrection actually made him to be son of God rather than simply demonstrated it. And so on.
Don't forget the voice out of the clouds when Jesus was baptised saying "You are my beloved son in whom I am well pleased". This is a direct quote of Psalm 2 which is a Messianic Psalm.
Yes, Mark 1:11 is a quotation from Psalm 2, but that's not a messianic psalm, it's a royal one. It portrays the coronation of the king. The theme is picked up again later, in Mark 11:9-10, where the crowd welcomes Jesus by quoting Psalm 118:26. Psalm 118 was probably originally sung while the king processed through the Temple. So the use of these Psalms in reference to Jesus is presumably meant to indicate that he is the true King of Israel and true heir of David (who, in New Testament times, was believed to have actually written those psalms). They have a royal connotation rather than a metaphysical one.
Jesus also did things that only God could do, such as forgive sins, heal the sick and raise the dead. He not only said he was God, but he also showed he was God by his actions.
This is something people often say but I'm afraid I've always thought it a very weak argument. Other characters in the Bible heal the sick and raise the dead. As for the forgiveness of sins, I don't know of any good evidence that Jews at that time did think that only God could do that (at least in the sense that they thought it was blasphemous to tell someone that their sins were forgiven). In the story in question, Jesus seems to challenge the scribes' claim that only God could forgive sins by pointing out that it's perfectly easy to tell someone that their sins are forgiven, and that it's harder to cure the sick, which he then goes on to do. He links his ability to forgive sins to his title of "son of man", not "son of God". So I would say that the evidence that Jesus either claimed to be divine or acted as if he were divine is pretty thin at best.