I am still considering evolution and working through the theological implications. I have a lot more reading to do on that before I come to any conclusions.
I experienced a paradigm shift in my view of origins when I discovered the crucial distinction between
natural history and
redemptive history. On this nascent view that I am developing, Genesis 1 clearly marks the dawn of redemptive history 6,000 years ago, but I haven't found any exegetical warrant for believing that natural history had the same starting point. Just as the construction phase of King Solomon's temple spanned several years before the days-long inauguration phase, so also natural history and redemptive history had different starting points. On my view of the cosmos as temple,
natural history had been unfolding for several billion years (construction phase) when
redemptive history dawned on the scene 6,000 years ago (inauguration phase), and the latter is the subject of Genesis. On this view, natural history is the stage upon which the drama of redemptive history unfolds, and it is redemptive history that reveals the meaning and purpose of natural history. I don't think the Bible has anything to say about natural history; it is only ever concerned about redemptive history, all of which points toward Christ and was recapitulated in his incarnational ministry.
Theologians have been clear that the Bible is not about science but about salvation, that from start to finish it is about Christ and his redeeming work. After he was raised from the dead, he encountered those two men on the road to Emmaus and, "beginning with Moses and all the prophets, he interpreted to them the things written about himself in all the scriptures" (Luke 24:27). From this and other texts it is clear that Jesus himself interpreted Scripture as a testimony to himself, not as a source of scientific inquiry. Genesis unveils redemptive history, the moment when God entered into a covenant relationship with mankind through Adam as our federal head, a history that reaches forward to the eschaton when God will head up all things in Christ.
Does Genesis also mark the dawn of natural history, the material origin of the world? Young-earth creationists claim that it does, but they're relying on a plain or straight-forward reading of an English text using modern categories of thought. My biblical world-view requires something more. We need to interpret Genesis literally using a robust historical-grammatical exegesis of the text (in its original language and ancient cultural context). Leave the plain or straight-forward readings of English translations to personal devotions.
"But couldn't Genesis 1 also be about material origins?" someone might ask. Sure, it could be—but is it? That is the question, and the answer must be exegetical. Our conclusions about the text must be drawn from the text, not imposed on it because it's familiar and traditional (eisegesis).
So, I believe the dawn of natural history occurred several billion years ago—the "construction phase" of the cosmic temple—whereas the dawn of redemptive history reaches back to the garden around six or seven thousand years ago—the "inauguration phase" of the cosmic temple. On this view, the days in Genesis 1 were normal 24-hour periods, Adam and Eve actually existed as real people, the events in the garden actually happened and it was only a few thousand years ago, and so on. Also, our planet is over four billion years old, dinosaurs went extinct around 65 million years ago, descent with modification from a common ancestor is real, the universe is nearly 14 billion years old, and so forth. Thus, we have redemptive history on the one hand and natural history on the other. Both are true and fully consistent, without a shred of contradiction or even tension. The key is realizing they are not the same thing: Natural history is disclosed through general revelation (which we explore scientifically), the meaning and purpose of which is unveiled in redemptive history disclosed through special revelation (which we explore theologically).