Why natural selection doesn't work

Natural selection is no mere idle fancy. Every so the logic behind it stirs a call for eugenics. "Unless we embrace genetic engineering, we will become a sickly and frail species" says Johnjoe McFadden, reader in molecular microbiology at the University of Surrey. Is natural selection so established a theory that we must take to the tumbrills and the guilotine once more?

Natural selection is notoriously hard to critique. Logically, it must contribute to evolution to some extent, just as, logically, friction must to some extent contribute to driving an automobile. But just as friction doesn't actually drive the automobile, natural selection may not be what actually drives evolution. How can we think our way through this?

I've arrived at a context in which it may be easier to evaluate natural selection. It's a physical situation that I think presents us with a parallel with the action of natural selection. More...

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