Two main explanations have been offered for our planet'speculiar friendliness to life. The design theory says that God madethe world, placed it in the Goldilocks zone, and deliberately set upall the details for our benefit. The anthropic approach is verydifferent, and it has a faintly Darwinian feel. The great majority of planets in the universe are not in the Goldilocks zones of theirrespective stars, and not suitable for life. None of that majorityhas life. However small the minority of planets with just the rightconditions for life may be, we necessarily have to be on one of thatminority, because here we are thinking about it.

The God Delusion On page 137 Monday, November 5, 2012 @ 1:54pm