In Robert Wright's book, The Evolution of God, the primary point is made that God or Gods in all religions have evolved throughout the centuries. In an interview*, Wright contends that Monotheism (belief in one God) and the nature of God changed in the religion of Judaism. It is Wright's belief that Theism (belief in God) is a human construct. In other words, God is an invention of Man. The interview sheds no light to back up his statement of how things are. Perhaps the book sheds light on this statement, but Wright himself needs to be able to defend any truth claim that is being made, and believe me this is a significant claim. If he could give evidence to support the claim that God is, in fact, an invention of Man then the whole game changes. If God does not exist, then life is ultimately without hope, purpose, or meaning. So, why would he even bother trying to say God is an invention of Man, Isn't he essentially trying to give meaning to meaninglessness?
* interview with Robert Wright in Houston Chronicle Belief section (July 31, 2009)
* a review of Wright's book: http://www.godandscience.org/apologetics/evolution_of_god.html#2g0BlsIq4bMC