My theory is that all mathematically and logically possible universes exist. We exist only because it is mathematically and logically possible that a universe could exist that contains us. If this theory is true, then the fact that the laws of physics seem to be especially suited for the creation of life is not a mystery. The only universes that are capable of being seen by anybody are those universes where the laws of physics were set up in such a way that evolution could get working and conscious beings could arise.

The question of why there is something instead of nothing doesn't get solved, but I think we can at least shine a little light on it. The relationship between logical consistency and existence is such that something cannot be both logically consistent and non-existent in the multiverse. The multiverse is a giant, mindless computer, working through the rules of logic, creating every possible combination of true and false things, one of which, interestingly enough, is you.