A just-right universe for us

I have been blogging on a book that our class at church will be reading together--I Don't Have Enough Faith to be an Atheist by Geisler and Turek. For this entry I want to cover what is probably my favorite section of the whole book. It involves the argument from design, also called the teleological argument. It looks like this: every design had a designer; the universe has highly complex design; therefore, the universe had a designer. In the last few years science has uncovered so much evidence of complexity in the universe that argues powerfully for the existence of God.

For one thing, the universe is specifically organized to enable life to exist on earth. Think about just the solar system--no other place is able to sustain life. We live, like Goldilocks, in a just-right position, neither too hot (Venus) or too cold (Mars).We have around us scores of improbable and interdependent life-supporting conditions that make earth a perfect home in a hostile universe. These highly precise environmental conditions go by the term "anthropic principle." The universe looks fine-tuned to support human life here on earth.

What are some of these conditions that are exactly right? I'll just list some, skipping the details, but the book explains each more fully: the percent of oxygen in the atmosphere, the transparency of our atmosphere, the moon-Earth gravitational interaction, the amount of carbon dioxide in the Earth's atmosphere, the gravitational force in the universe, the expansion rate of the universe, the velocity of light, the level of water vapor in the atmosphere, the precise location of Jupiter in the solar system, the thickness of the Earth's crust, the rotation of the earth, the tilt of the Earth's axis, the rate of lightning in the atmosphere, seismic activity on the earth. There are something like 122 of these conditions both on earth and throughout the universe that have to be precisely right for us to exist.

The authors quote a Nobel Laureate, Arno Penzias, who has this to say after examining the conditions like the ones in the previous paragraph: "Astronomy leads us to a unique event, a universe which was created out of nothing and delicately balanced to provide exactly the conditions required to support life. In the absence of an absurdly-improbable accident, the observations of modern science seem to suggest an underlying, one might say, supernatural plan."

The skeptic's response comes in several flavors. One popular one today is called the Multiple Universe Theory. This theory says there actually is an infinite number of universes in existence, so it's no wonder that at least one looks like the one that we are in. There are significant problems with this explanation. First, there is no evidence for it. Secondly, an infinite number of finite things like universes is an actual impossibility. Third, even if there were other universes, they would need fine-tuning to get started just as ours did.

This chapter in Geisler and Turek's book discusses design of the universe, but there is much more to this design argument. The other area of design that is so powerful today has to do with the microscopic level. Design that went unnoticed in Darwin's day is being revealed in exiting ways. I'll cover those in the next blog.