Alexiev wrote: ↑Sat Jan 25, 2025 12:20 am
Immanuel Can wrote: ↑Fri Jan 24, 2025 7:13 pm
Darwin himself insisted that Natural Selection could only "select" for those mutations that were an immediate survival advantage. He said it is "utterly blind" to anything that does not increase survival chances, and has to "select against" anything that is harmful in regards to survival. So the idea that an irreducibly complex organ could develop by stages is simply ruled out by the basic mechanisms to which Darwin himself .
No evolutionary theorist subscribes to that anymore.
Hmmm...I don't think that's the case. At least, there's not another mechanism but survival of the fittest to power Evolutionism, so far as I know.
The gene -- not the individual -- is passed down to the next generation.
Oh. The "selfish gene" theory. Well, nobody can take that one seriously. Genes do not "intend" things. And there's no
mechanism that would prefer the survival of genes over individuals. In fact, it's contrary to survival of the fittest itself: Darwin's whole idea was that the individual would survive if it, the individual, were more adapted; but the selfish gene theory implies that genes are "smarter" than individuals, and aim at their own survival in the face of the death or detriment of the individual.
Also, minor changes (like a minor sensitivity to light) may confer adaptive advantages
That sounds possible, until we think about it. When we do, we realize that "light sensitive spot" has already skipped several alleged stages of evolution. Essentially, it's begged the whole question, by pretending it's solved problems its only skipped over.
It's one thing for a spot to be altered by light. But it takes a great deal more to make it "sensitive" in a brain sense: it has to be connected by a series of relays to the brain. That's allegedly millions of years of evolution, with no survival advantage at all involved. And even after those millions of years, the "sensitivity" has to convey to a sufficiently developed brain enough reliable information to enable the organism to have an actual survival advantage. That's millions more years, with no survival-value being implicated at all. That's just the kind of thing that Darwin claimed was utterly impossible. But you can see yourself: if survival of the fittest is the mechanism, then you're looking at multiple millions of years of evolution WITHOUT any involvement of the key mechanism.
Now, there's a theory that's too thin, for sure. It would really need to be filled out with all the intermediate stages, each one identified with the survival advantage it produces. And still, we're nowhere near the development of an eye.