I must confess that I have something in common with Creationists: I find it difficult to understand how the earliest and simplest life forms came to exist. Unlike the creationists, however, I am not willing to suggest that the earliest life forms were created as-is by some sort of disembodied sentient Supreme Being. I can’t fathom how such a Being could get anything at all done, given that “he” is alleged to be disembodied; for instance, some sort of physical neural network is a prerequisite for cognition. Further, those who posit that life was created as-is by a supernatural Creator need to explain how that Creator got here in the first place; their creation of a Creator constitute an eternal regress. Who created “God,” and God’s God, etc.
Thus, I don’t believe in a ghostly Creator, but where does this leave me? How did the earliest life forms emerge from non-life? Though firm answers have not yet been derived from rigorous scientific experimentation, I am intrigued by the ideas put forth by Stuart Kauffman in his 1995 book, At Home in the Universe: The Search for Laws of Self Organization and Complexity.
Early in his book, Kaufman points out that the simplest free living cells (called "pleuromona") are highly simplified types of bacteria. They have a cell membrane, genes, RNA, protein synthesizing machinery and all the other necessary gear to constitute a form of life. Here's the problem:
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