The author makes an interesting point, if the hypothesis of multiverse is unprovable (due to lack of observations of the other universes), then it is exactly as sound as a the hypothesis of a creator who chose our universe parameters.
You don't need intelligent design, because the only universes in which we exist are the ones capable of sustaining us.<p>The Eye is really complex how could it possibly have evolved with out Intelligent design? I'm told this lots of times. Here is a better one for those people. Why is water a universal solvent, non-flammable, buoyant as a solid floating in its liquid form, exist in all states of matter at in a range of temperatures we can live?<p>You know why eye's exist? Because Water Exists. If there is a universe where water doesn't float as Ice, the oceans would freeze solid killing all the macro life forms, we'd never evolve eyes, and the world would be limited to single celled organisms.<p>If gravity was 10% less strong than it is Earth would be farther from the sun, and too cold to live on.<p>The only observable universes are the ones where observers exist. That doesn't prove the existence of God, it proves the existence of man.