Hi-
At the request of Omega Red in another thread, I here present a brief overview of my round-trip through YEC. (I wrote this on-the-fly before lunch, so if there are any discrepancies with earlier write-ups of the same material, I'd trust the earlier writing.)
I was raised by college-educated Christian parents who subscribed to mainstream science. My dad has a degree in biology. When I was a child, my mom read me all kinds of books on earth history, particularly those about dinosaurs. We traveled a lot, and took the time to visit museums, geological sites, etc. When I got older, I continued reading science books on my own, including ones about biology and earth history.
I don’t remember thinking much about how all this might conflict with a naïve literal interpretation of Genesis. I suppose I would have thought one (or both) of two things: 1) that the stories in Genesis were mythological and figurative, teaching lessons rather than science and history, or 2) there was some possible harmonization (as some old-earth creationists believe).
When I got older, before I went to college, I made a renewed commitment to Christ. At that time, YEC creationism (nascent “creation science”) was in the ascendency among evangelicals. Most of my Christian experience during that time was with evangelicals, and I came to see YEC as practically a tenet of the faith. At the very least, I thought Christians who accepted mainstream science were naïve or thoughtless.
How did this transition happen in someone who had been educated in mainstream science since before being able to read. Two factors came into play. First, I thought it was what I was supposed to believe to be a good Christian, this gave me a strong impetus. Second, and perhaps more pertinent to this essay, I believed the counter-explanations for the mainstream data that were being published on the YEC side
without looking too deeply into those explanations.
I didn’t do this lightly either. I studied a lot of geomorphology and biogeography in those days, and I really do believe my YECism impacted my grades negatively in some cases (to a minor degree). Not that the professors deliberately singled me out; they did not care what I believed as long as I learned the material. What hurt me was that I was so militant in my YEC beliefs that – even though I learned the mainstream material – I refused to regurgitate any more of the mainstream view than I had too, even on tests and required papers.
But even then, I realized something was wrong. Though I don’t think I explicitly realized it, I think I instinctively understood that the mainstream explanations were inherently concordant and strong, while the YEC arguments were ad-hoc and weak.
And saddest of all, though I did manage to learn the mainstream material and get pretty good grades in the end, my YEC entanglement deprived me of the sheer joy of learning basic science. You see, I had to approach everything combatively and in fear. Similar to how current YEC websites publish counter-arguments to any of the latest discoveries which threaten the YEC worldview, I had to be ready with internal counter-arguments lest my YEC defenses be breached.
As time went on, and I went to graduate school, I became more and more aware of how weak (and very often just flat-out wrong) the YEC explanations were. It affected me less on a day to day basis, however, because even though I studied biogeography in graduate school, my focus was on bioclimatology rather than historical biogeography.
Fast-forward a number of year: biogeography left behind, now working at a career in artificial intelligence programming. My job was partially R&D, so I had a good bit of time on my hands to explore things of interest. One day, I was working on a set of genetic algorithm routines for finding the exponents which solved some polynomials. I noticed an interesting behavior: the system seemed to advance in a set of “jumps.” It would work along making minor tweaks, and then suddenly some really good solution would emerge and the system would jump to a new state. I thought: “If I took snapshots of this behavior at random, like in the fossil record, this would just like punctuated equilibrium.” I still remember that exact moment.
Obviously, being interested in genetic algorithms, there were already some holes appearing in my YEC armor. But my experience of genetic algorithm “punk-eek” got me started wondering: “how good are those YEC arguments, anyway?” And so, to make a long story short, I exhaustively revisited all the YEC arguments and found them all wanting. Not all at once (I was busy with life at the time) but I got around to it. (And I have done likewise done so with all the new arguments in the intervening time since them.)
For a while, I tried to maintain a two-path approach: believe YEC fideistically, while maintaining an intellectual believe in the mainstream view. But that kind of double-think was unsupportable. So eventually I became an ex-YEC.
My saving grace that prevented a crisis of faith was twofold. First, that I had been raised by Christian parents who subscribed to mainstream science. Second, all of the excellent Christian professors and fellow students I had know who also subscribed to mainstream science (and who put up with my YEC excursion). So I had good role-models to fall back on. The extent that there was rigorous intelligence involved in this process, these people were it; I’m the slow learner,

.
Since then, I have largely accepted the prevalent mainstream and liberal Christian viewpoint: the stores in Genesis are lessons from our spiritual ancestors. These lessons are set in the world as they understood it. We now have more data and we understand the world differently, but that does not devalue those lessons. In fact, we now have the advantage of being able to understand those lessons on two levels. First, we can consciously suspend our assumptions of modern knowledge and attempt to understand the stories as written. Second, we can look at them in a larger context, and perhaps by understanding the interface between the stories and the worldview they presuppose, we can understand them better than with a naïve reading.
And that, in capsule, is my “there and back again journey to YEC.”
-Neil