There is another view on why quantum gravity in cosmology is so important today.
Will Science Someday Rule Out the Possibility of God?
""Over the past few centuries, science can be said to have gradually chipped away at the traditional grounds for believing in God. Much of what once seemed mysterious — the existence of humanity, the life-bearing perfection of Earth, the workings of the universe — can now be explained by biology, astronomy, physics and other domains of science. Although cosmic mysteries remain, Sean Carroll, a theoretical cosmologist at the California Institute of Technology, says there's good reason to think science will ultimately arrive at a complete understanding of the universe that leaves no grounds for God whatsoever. Carroll argues that God's sphere of influence has shrunk drastically in modern times, as physics and cosmology have expanded in their ability to explain the origin and evolution of the universe...Cosmologists can model what happened from 10^-43 seconds after the Big Bang until now, but the split-second before that remains murky. Some theologians have tried to equate the moment of the Big Bang with the description of the creation of the world found in the Bible and other religious texts; they argue that something — i.e., God — must have initiated the explosive event. However, in Carroll's opinion, progress in cosmology will eventually eliminate any perceived need for a Big Bang trigger-puller. As he explained in a recent article in the "Blackwell Companion to Science and Christianity" (Wiley-Blackwell, 2012), a foremost goal of modern physics is to formulate a working theory that describes the entire universe, from subatomic to astronomical scales, within a single framework. Such a theory, called "quantum gravity," will necessarily account for what happened at the moment of the Big Bang."
Sep-2012 report by livescience.com