Less variations in genes, more likely to produce bad next generations, why?

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Quote from: Quintet on February 04, 2023, 04:32:32 AMI ask this question because I've already seen many Eugenic theories on this forum like short people should stop reproducing, other people with other bad traits should, but I read somewhere that Eugenics is actually a nonscientific compressed bull  because it does not take into account the importance of variations in genes and the less variations in genes the more likely to produce bad next generations instead for example the 'weird' babies as results of inbreeding.

So I am just wondering why less genetic variations will cause higher probabilities of inbreeding tragedies.

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Quote from: Medium Drink Of Water on February 04, 2023, 04:05:42 PMYou can come back but you still have to use the same name.  Your Sorcerer account is unbanned now.

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Quote from: Sorcerer on February 05, 2023, 05:01:21 PMI have already achieved good therapy and focused on other things except height. Now I even don't consider LL.

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Quote from: oklama on February 12, 2023, 10:44:46 PMif short people stopped producing short people would still exist its just that short would be 5'8 instead of 5'6 now.

there is seriously no fix to this issue besides either making technology so everyone can be the same height
or
a change in culture that de-empahsizes height, it is possible, there are cultures where short men are of higher value ( I think in Africa) now this is also bad but we need equality

honestly I think the first option would be more likely to happen.

if we are going the eugenics route, tall people should stop producing because there are zero advantages in the modern day to bigger bodies. of course this a ridiculous belief to hold and I don't believe they should as it really doesn't matter, but short genes are actually good genes when you remove the social aspects.

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Quote from: Sorcerer on February 12, 2023, 11:36:47 PMI don't think tall genes have zero biological advantages, the reason why society is gravitated to tall genes is just because they have advantages in biology. But indeed I heard that in the evolutionary review, creatures will become smaller and smaller as evolves to increase survability, but I don't think that applies to human because human is very special——They have the intelligence to survive any catastrophe, not like animals.

In all fairness I think the first option is indeed more likely to happen but the same height is impossible. I'd rather believe as the technology of height increasing the value of being height will subside. Think about it if everyone can get taller arbitrarily, the value of height for sure will decrease. People like persistent beauty. So the first option will realize what you say in the second option.

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Quote from: Quintet on February 04, 2023, 04:32:32 AMI ask this question because I've already seen many Eugenic theories on this forum like short people should stop reproducing, other people with other bad traits should, but I read somewhere that Eugenics is actually a nonscientific compressed bull  because it does not take into account the importance of variations in genes and the less variations in genes the more likely to produce bad next generations instead for example the 'weird' babies as results of inbreeding.

So I am just wondering why less genetic variations will cause higher probabilities of inbreeding tragedies.