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  4. Has natural selection been nullified in humans ?
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Has natural selection been nullified in humans ?

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Offline Petrochemicals (OP)

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Has natural selection been nullified in humans ?
« on: 07/06/2023 15:40:54 »
Given that we have had thousands of years of society, with it's "don't kill" ethos and "no adultery/bigamy" dictate, has this bred into the human population inherent illnesses?
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Re: Has natural selection been nullified in humans ?
« Reply #1 on: 08/06/2023 01:08:44 »
Natural selection still has plenty of sway in human development: disease and accidents are still a big killer in all countries.

I wouldn't be surprised if the incidences of some diseases has increased because of advanced medical treatments. Those with weaker immune systems are more able to survive and pass on their genes in developed countries nowadays.
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Re: Has natural selection been nullified in humans ?
« Reply #2 on: 08/06/2023 17:31:29 »
Everyone now has a legal right to reproduce, and everyone else has a duty to keep the offspring alive 'cos of its Yuman Rights, so on average the species will be getting less fit and more selfcongratulatory..
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Re: Has natural selection been nullified in humans ?
« Reply #3 on: 08/06/2023 17:56:34 »
Quote from: alancalverd on 08/06/2023 17:31:29
Everyone now has a legal right to reproduce, and everyone else has a duty to keep the offspring alive 'cos of its Yuman Rights, so on average the species will be getting less fit and more selfcongratulatory..
More than that, over the millenniums, rulers have begot many many children, the rich have carried forward wealth, these genes are the ones that are prevalent, as was seen in the haemophilia of Queen Victoria's families.
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Re: Has natural selection been nullified in humans ?
« Reply #4 on: 11/06/2023 20:32:01 »
This to me, does not seem like Natural Selection atall.

https://www.bbc.com/news/science-environment-65538866
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Re: Has natural selection been nullified in humans ?
« Reply #5 on: 12/06/2023 13:41:39 »
Quote from: Zer0 on 11/06/2023 20:32:01
This to me, does not seem like Natural Selection atall.

https://www.bbc.com/news/science-environment-65538866
It's natural for humans to do artificial things so...

Natural selection still applies to humans.
Imagine that we had a pandemic which combined factors from 3 previous ones.
As lethal as MERS (About 1 in 3 dead)
https://en.wikipedia.org/wiki/MERS
As widely spread as covid
and, like bubonic plague, strongly influenced by the genetic makeup of the person.
https://www.theguardian.com/society/2022/oct/19/gene-black-death-survivors-linked-autoimmune-diseases

What would happen?
« Last Edit: 12/06/2023 18:08:42 by Bored chemist »
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Re: Has natural selection been nullified in humans ?
« Reply #6 on: 16/06/2023 19:24:45 »
Quote from: Bored chemist on 12/06/2023 13:41:39
Quote from: Zer0 on 11/06/2023 20:32:01
This to me, does not seem like Natural Selection atall.

https://www.bbc.com/news/science-environment-65538866
It's natural for humans to do artificial things so...

What would happen?

Yes an Artificial action can be deemed as a Natural response towards untoward changes.

I still think catching the disease & fighting it off by immune responses seems Natural.
But creating & administering Vaccines seems Artificial.
Anyways, if it works, it's Beneficial!

Regarding " What would happen? "
Alot many will cease to Exist & even more shall Survive.
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Re: Has natural selection been nullified in humans ?
« Reply #7 on: 17/06/2023 11:16:27 »
Quote from: Zer0 on 16/06/2023 19:24:45
Regarding " What would happen? "
Alot many will cease to Exist & even more shall Survive.
What would that mean in evolutionary terms?
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Re: Has natural selection been nullified in humans ?
« Reply #8 on: 18/06/2023 19:53:27 »
Quote from: Bored chemist on 17/06/2023 11:16:27
Quote from: Zer0 on 16/06/2023 19:24:45
Regarding " What would happen? "
Alot many will cease to Exist & even more shall Survive.
What would that mean in evolutionary terms?

Immunity for the Survivors.
Until something else pops up.
I've heard Viruses evolve too.
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Re: Has natural selection been nullified in humans ?
« Reply #9 on: 26/06/2023 13:59:14 »
So how bad has the situation got, as compared to a populace that would be shaped by natural selection?

There are the obvious early mortality genetic pass ons, early onset cancer as in Angelina Jolie, bad hearts, there are the non lethal ones such as diabetes asthma etc and there are the nondescript pass ons.
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Re: Has natural selection been nullified in humans ?
« Reply #10 on: 27/06/2023 19:11:19 »
Quote from: Petrochemicals on 26/06/2023 13:59:14
So how bad has the situation got, as compared to a populace that would be shaped by natural selection?

The way in which i understand the Subject, in my very own opinion, there is hardly any unaltered lineage of homo sapiens conforming to
 ' Natural Selection ' .

I've heard a bit about beings resorting to ancient primitive methods of lifestyles even in modern times.

But hardly seen any evidence of ' Social Animals '(us) surviving in natural habitats without the usage of Tools or Fire.
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Re: Has natural selection been nullified in humans ?
« Reply #11 on: 28/06/2023 11:31:13 »
Homo "sapiens" has evolved to its present extravagance and fragility through our ability to collaborate over very large groups, and the independence of our hands and feet - we can stand up and perform complicated and precise manipulations far better than our ape cousins.

Problem is that all this requires a very large brain to body ratio, so our heads have grown to a size that is in many cases incompatible with unassisted childbirth. We have also colonised vast areas of the planet that are actually unsuitable for hairless apes to survive without tools and longterm planning. And then we have overpopulated those regions and allowed parasitic diseases like politics and religion to flourish and compromise both collaboration and planning, so that we spend as much time competing for unsustainable resources as we do enjoying them.

In consequence, unless we radically reform human society, we have doomed our species to revert to living as diminutive tropical hunter-gatherers. Problem is that most of those who know how to do that, have been systematically or accidentally exterminated in the name of Faith or Progress,
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Re: Has natural selection been nullified in humans ?
« Reply #12 on: 28/06/2023 16:48:22 »
Sssh, Alan, keep your voice down, a post like that might invite yor_on to join in and add thousands of pages of futility.
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Re: Has natural selection been nullified in humans ?
« Reply #13 on: 28/06/2023 17:56:27 »
Quote from: Zer0 on 27/06/2023 19:11:19
Quote from: Petrochemicals on 26/06/2023 13:59:14
So how bad has the situation got, as compared to a populace that would be shaped by natural selection?

The way in which i understand the Subject, in my very own opinion, there is hardly any unaltered lineage of homo sapiens conforming to
 ' Natural Selection ' .

I've heard a bit about beings resorting to ancient primitive methods of lifestyles even in modern times.

But hardly seen any evidence of ' Social Animals '(us) surviving in natural habitats without the usage of Tools or Fire.

Not really, small villages became imbred, for example

https://cyclingmagazine.ca/sections/news/cycling-played-a-huge-part-in-reducing-inbreeding/

"Even" the royals managed to marry within the family, exasserbating at least their own haemophilia situation and God knows what else. It is a clear case of societal constructs overriding the survival of the fittest and due to the prominence of the Royal position they no doubt managed to increace the ammount of Royal DNA in the populace. This is just one example.
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Re: Has natural selection been nullified in humans ?
« Reply #14 on: 30/06/2023 18:23:02 »
Sorry!
By Unaltered Lineage, i did Not mean DNA or Epigenetics.

I was thinking about
" Social Animals " .

I can easily Discard the ' Tool ' usage point.
Other species have been Observed to use tools.

But i Cannot get over the Fact that No other species Knowingly creates, controls & extinguishes Fire!
(xcept DragonZ)

I view Us as Homo Deus.
& I do Not see any Sapiens anymore.
(personal belief)
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Re: Has natural selection been nullified in humans ?
« Reply #15 on: 01/07/2023 14:54:33 »
Quote from: Zer0 on 18/06/2023 19:53:27
Immunity for the Survivors.
OK, that seesmsensible.
Now consider this odd fact.
There's a group of people who are relatively immune to HIV because they are descended from plague survivors.

For a few hundred years the "after effects" of the black death on HIV susceptibility were apparently irrelevant.
Then a new bug turned up...

It seems to me that we haven't finished evolving yet.
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Re: Has natural selection been nullified in humans ?
« Reply #16 on: 01/07/2023 14:55:01 »
Quote from: Zer0 on 30/06/2023 18:23:02
never say never.
https://en.wikipedia.org/wiki/Fire_adaptations#:~:text=An%20example%20of%20animals'%20uses,the%20escaping%20insects%20and%20rodents.
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Re: Has natural selection been nullified in humans ?
« Reply #17 on: 01/07/2023 16:33:15 »
Quote from: Zer0 on 30/06/2023 18:23:02
No other species Knowingly creates, controls & extinguishes Fire!

Some Australian crows carry burning twigs from forest fires to start grass fires, then feast on the escaping insects and lizards. Interestingly, if a grass fire gets out of hand, the thermal breeze carries insects inwards and upwards, so there's a real feast of cooked protein at about 3000 ft.
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Re: Has natural selection been nullified in humans ?
« Reply #18 on: 01/07/2023 17:44:24 »
Corvids seem to be the smartest of birds, often fashioning tools to obtain food. I had not heard of the burning twigs but I have no problem believing it.
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Re: Has natural selection been nullified in humans ?
« Reply #19 on: 02/07/2023 11:25:59 »
Allegedly they learned the trick from native Australians, the smartest of humans, who use controlled burning to clear scrub for cultivation.
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