DFK! wrote:
Which is exactly what I just said. Selective breeding interferes with natural selection. Genetic modification does not. They are at different ends of the process. Genetic modification does not have anything to do with whether that modification is "selected" afterward for propogation.
However, there is nothing less "natural" about Selective Breeding than simply leaving human actions out of the equation. Human choices and actions are just as natural as those of any other species.
You don't get to change definitions to be what you want. Words have meanings.
You're using them improperly. Sure, humans are part of nature. Irrelevant, and tautological. Natural Selection has a definition. Artificial Selection has a definition.[/quote]
And you aren't following them.
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If you use gene therapy to make somebody not retarded, or not crippled, or not gay, or not X or not Y, you have inherently and artificially improved their chances at breeding. You have artificially selected circumstances that alter their likelihood of propagating their gene pool. If you artificially make their dick bigger, sperm spermier, or womb wombier, you've artifically selected circumstances in favor of their gene propagation as well.
Random mutations can do the same thing. Which doesn't matter, because none of that is part of Natural Selection. Yes, you've created (either intentionally or randomly) a new or different trait in the species. Natural Selection will then decide whether that trait is "worthy" of passing along to the next species. And no matter how beneficial such a trait seems to us, it will not necessarily be passed along. Lower IQ/Lower income/Less educated people tend to have more children than their higher IQ/higher income/higher educated counterparts to, as a general average. I believe nature is selecting against advancing human intelligence, because for some reason we do not understand, the more competent you are, the less likely you are to pass along your genetics to many offspring. Ultimately, the source of the genetic mutation doesn't change whether or not it is naturally selected for survival, and does not change whether it is naturally or artificially selected.
Now, if you proceed to introduce that genetic mutation into the entire populace (or as much of it as possible), or introduce eugenics programs to propogate the mutation, in an attempt to sidestep natural selection, then
yes, at that point, it's "artificial selection." (A completely meaningless term, but still true.)
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I don't really care what people believe in this matter, but you literally cannot think that Natural Selection is a "good" thing for species and logically believe that genetic modification is also "good." This is true of things like in vitro fertilization or surrogacy (of the womb) as well. Feel free to be illogical and hold both beliefs, because I don't care what you believe. I'm simply pointing out a logical fact of the situation.
Several issues with this paragraph. (1) Science does not make value judgements. Natural selection is not "good" or "evil," it simply is. It exists. It's how we evolved. (2) Nothing precludes natural selection and "artificial selection" from both being good things, depending on what the goal is.