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I agree with you that purposeful gene editing ought to be better than random evolution at the individual level. However, grand parent raises a good point about
by noobhacker 9y ago
I agree with you that purposeful gene editing ought to be better than random evolution at the individual level.
However, grand parent raises a good point about reduced diversity, which is bad at the species level. There is really no way to guard against this because:
1. Even though diversity is good at the species level to safeguard against future disaster, everyone will race to have the same set of (currently) desirable traits. Framed another way, since human genetic diversity is a public goods, few people will help maintain it at the cost of their own benefit
2. While we could theoretically understand the genome in full, I'd argue it's impossible to foresee all the potential disasters that can wipe out a genetically homogeneous humankind.
- zerostar07 9y agohasnt diversity already been reduced by transportation? didnt it prove to be a bad things for american indians?
- p10_user 9y agoThe opposite is true - transportation has increased diversity. The American Indians suffered due to a lack of exposure to diseases (smallpox) common in Europe due to their relative isolation
- hutzlibu 9y agoErm ... that's also a way to put it. Another way to put it, they would not have suffered if not for rapid transportation. But genetic diversity did increased - through mating.
- dynofuz 9y agoa lack of diversity is only really bad in a changing world. however humans have made the world far more stable than before, and as we move our civilization into space, we'll find likely more stability (in the long run)
- noobhacker 9y agoThe potential disasters can be man-made as well. Therefore, even though we're increasingly better at taming the vagaries of nature, we're increasingly at the mercy of our fellow men.
- deleted 9y ago[deleted]
- YouAreGreat 9y ago> humans have made the world far more stable than before You must be kidding. Humans have changed their environment almost beyond recognition. We may already have broken ourselves, look at birth rates in the most industrialized countries.
- paulie_a 9y ago"as we move our civilization into space" That is pretty optimistic
- musage 9y agoWe can't even make it on Earth without horribly fumbling it, how would moving out to dead rocks help? This is how we play for time, this is the whimpering with which we fade out. Looking straight at the iceberg, saying "it'll probably transform to cotton candy if we hit it fast enough". The drunk captain and the armed guards letting no sane person near the bridge is how you know everything is fine.
- imron 9y agoExactly, just look what happened with dog breeding and how many breeds now suffer from significant genetic defects due to trying to breed desired traits.
- maxerickson 9y agoThe defects are largely a result of the limited capabilities of the breeding process (cross animals with a trait, hope that not too much other stuff comes along for the ride). A fun angle: genetic engineering will eventually enable us to correct many of the problems in purebred animals. They are often good targets for even a limited genetic engineering capability (where the pure bred population has a high frequency of a single defective gene).
- marchenko 9y agoSome of the problems with dog breeding are due to the inefficiency of he breeding process, but others are simply the direct biomechanical consequences of the desired traits; for example the neotenous compressed faces of many lapdog breeds have consequences for mastication, respiration, and orbit shape that can't really be addressed without relaxing our selection for that particular look or accepting other tradeoffs.
- hrktb 9y agoI find the argument about reduced diversity to be way too optimistic (or pessimistic ?) about people’s will and might to change their genes. To draw a parralel, esthetic chirurgy is wildly available at relatively reduced risks, and it’s not like every bloke and their dog goes to have a face lift, even if it’s understood that a better appearance would have benefits. Or even thinking about the core group of people who refuse to vaccinate. There’s just no way a medical practice is applied to the totality of a population, even by law.
- michaelt 9y agoit’s not like every bloke and their dog goes to have a face lift Right, but society has a conflicted history with beauty - some parts of our culture like and reward beauty, other parts curse the vain and superficial - and especially with people making uncommon efforts to improve their looks. Not so with being born charismatic, tall, smart, healthy and with a full head of hair.
- superb_herb 9y agoYou’re forgetting about a place like South Korea. 20% of women there have plastic surgery, compared to 5% of women in the US. And that 20% number is rising, and even men get face-lifts there.
- arkh 9y ago> everyone will race to have the same set of (currently) desirable traits I think it is not the case. Just on Earth you need different traits due to different climates and life conditions. Once we start really colonizing our solar system what makes humans better on some rock will be different for another or just for space: weaker heart, better bone density, some myopia could be useful to limit the currently known effects of 0G.