The interesting thing is that while I defend biblical creation, C.S. Lewis started out his Christian life as a theistic evolutionist. His early theological works reflect a belief in evolutionism.
At least at one point in Mere Christianity, Lewis made use of the evolutionary myth to try to illustrate what spiritual growth in Christ is like.
The Problem of Pain is a good read. The book was written to answer the question of why there is suffering in the world, and Lewis made a lot of very helpful points. But there is a weakness in the book.
If theistic evolutionism were true, that would mean that there was suffering, disease, and death in the world before humans existed and sinned. That is an irreconcilable contradiction to God's word, which says
"So, in the same way that sin entered the world through one person, and death came though sin, so death spread to all human being with the result that all sinned" (Romans 5:12 Common English Bible).
Lewis seems to have tried to get around this by mixing evolutionism and creation in an inconsistent kind of mash-up (see chapter five of The Problem of Pain). It seems he was already showing a growing disbelief in evolutionism.
It does make me glad that as Lewis grew in knowledge and understanding, his writings did begin to reflect a departure from theistic evolutionism. He began to show a leaning toward biblical creation.
He came to reject what he called "universal evolutionism"; apparently referring to macro-evolution as opposed to micro-evolution. Though for clarity, it is better to refer to micro-evolution as speciation within the biblical, created "kinds" (Genesis 1:11, 21, 24-25).
Lewis wrote, "You remember the old puzzle as to whether the owl came from the egg or the egg from the owl...universal evolutionism is a kind of optical illusion, produced by attending exclusively to the owl's emergence from the egg" (see link).
So Lewis eventually came to recognize the fallacy of evolutionism. And that is good because holding to biblical creation makes for stronger apologetics. Conversely, the old-earth-evolutionary compromise is a weakness in the arguments made by many of the current leading Christian apologists. There is simply no reason for it.
Evolutionism just does not mesh with the gospel. To defend the historicity of Matthew-Acts, but not that of Genesis is simply inconsistent. Believing in the events recorded in the Gospels and Act, there is simply no reason to disbelieve the events recorded in Genesis. In fact, the significance of the restorative works, atoning death, and redemptive resurrection of Jesus the Messiah is wholly predicated on Genesis.
In a debate with a Christian who accepts evolutionism, an atheist can mockingly say "You don't even believe the Bible, and you're trying to convince me!" The pastor at my church told of such an exchange that took place during a debate that he attended.
And evolutionism is not a scientific fact. Evolutionism is an interpretation of scientific data, just as creation is also an interpretation of scientific data. Not only is this so, but evolutionism, at its core, is a naturalistic, atheistic explanation of the universe, life, and origins.
Recommended sites:
www.answersingenesis.org
www.icr.org
http://creation.com/