Is it known why different races have varying brain structure and development...

Is it known why different races have varying brain structure and development? What selective pressures drove these divergences?

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is it known why OP is a faggot?

brains are expensive
they take a ton of calories and increase the probabilty of complications during pregnancy. before modern medicine and agriculture there was strong pressure to keep brains just big enough

the reason whites and asians lead in IQ is most likely because they've been living in more complex urban environments for a long time. This removes some of the pressures reducing brain size and also increases the competitive demands on the brain. Keep in mind that most of those demands are social, for example the number of faces you'll have to recognize in a day/lifetime; a big chunk of cortex is just facial recognition. So autists that have cortex dedicated to math instead of social/seduction are an accident/dead end. Evolution is trying to build more chads and stacies, not the people who consider themselves smart on Veeky Forums

>Evolution is trying to build more chads and stacies, not the people who consider themselves smart on Veeky Forums

wtf I hate evolution now

>long time
Like 3000 years tops and most "white" people around 2000. Iraqis and Egyptians have for like 4000 so how does this fit into your speculation?

>ITT: Veeky Forums pretends to understand evolution, but doesn't.
Evolution doesn't have a 'purpose', it just is.

A successful trait, mutation or not is passed on because an organism or organisms live(d) long enough to pass on their genetic material.

You're all a bunch of effete morons, LARPing scientists.

Everyone knows that Arabs and the middle east in general have high power brains because their civilizations were basically mirror western civilizations way back then.

They have the raw power, but they are culturally retarded. Basically, their culture of spiritualism fucks them up.

It is like how you see people in India living in absolute dirt but don't do a single thing about it because they simply think that living like shit now will make them gods in the next life so they never get a job, never get a home and if they get sick then they get fucking happy.

A computer can have the best specs in the world, but if it is running shitty ass, low performance ass, no optimization ass, buggy ass, software then it is all for nothing.

I am your last quote and I was just memeing man.

Ever heard of the wtf i hate X now meme?

Here, you fucking reddit fag.
knowyourmeme.com/memes/wtf-i-hate-x-now

Knowyourmeme, reddit and tumblr are more your speed anyways. So please do us a favor and gtfo.

Go back to /pol/

>Guys, guys, it was just a joke!
Yeah right, Kevin.

...

I don't know about the other guys but my post is literally a shitpost one liner meme.

Americans are mongoloid.

Back to /pol/

Can someone disprove pic related?

>Evolution doesn't have a 'purpose', it just is.
just read the selfish gene, you pedantic loser

evolution doesn't have agency but it is a pain the ass to say "gene X tends to increase fitness and thus will show an increasing frequency in subsequent generations until reaching its game theoretic equilibrium with competing genes of equal fitness"

so we just say evolution "wants"
it is just a shorthand, one that dawkins himself uses(after applying appropriate caveats). because protip: we're not publishing papers in these comment sections, so those of us who have a modicum of cortex dedicated to getting laid will naturally choose to speak like socially competent humans and not the basement dwelling (socially) learning disabled

tldr; stfu fgt u know nothing

Science is about being accurate, if you only enjoy semiaccuracy find the board labeled:
>/popsci/

TL;DR: You just got REKT!

>implying this board isnt /popsci/
most of the people on this board havent even graduated college, probably less than 1/1000 have PhDs

The human skull changes noticeably on a century-to-century basis, which is why you can get an approximate date of death, race, and sex by looking at a skeleton.

Also, the guy upthread who brought up urban environments is spot on.

average IQ keeps increasing with each successive generation, so, rather than saying that aboriginal peoples and blacks are simply "less intelligent" than asians and whites, it's more accurate to think of it as "these communities are lagging in IQ gains", imo. the reasons for those lags are pretty easy to deduce - quality of nutrition, quality of learning environment in formative years, et cetera. someone born near a large city - far away enough to enjoy clean air, but close enough to go to the museums and universities of that city - with at least one parental figure who doesn't have to work, and who has at least a college level of education - that kid is going to grow up with the "nurture" portion of the nature/nurture IQ score maxxed out, whereas a kid whose parents both work, who lives in a shithole, and who barely has access to books is going to have to rely exclusively on their natural IQ score, because there is no "nurture" for them.

anyway, /pol/ can keep trying. this is an empiricist board. if you want pure rationalism go troll Veeky Forums.

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>>>/reddit/

In Africa you dont have to think, in Asia and Europe you have to think. That is why blackies are dummies and whites and asians are smart.

found the butthurt leftcuck

This dude's on the ball

All homo sapiens have the same bran structure, it doesnt depend of the etnicy you are,if you wanna define yourself for your brain structure you are african.

done

you didn't disprove the data

you posted a picture of a table from a study

form your argument you dip

evolutionary pressure is a thing
tropical climates don't cause any
the reason for athletic ability of American blacks is the fact southerners literally bred them like cattle (this also serves as proof for evolution, if you needed any, and for the fact that IQ and strength are correlated - American blacks are more intelligent than the ones in Africa)
Europe was cold af
Survival required agility, deftness
tl;dr Euros more evolved for IQ than Afros

> ameroid lol

caucasoids head seems to be a little large, his ears are poking out, unnatural hair formation

Is he a bond from the 1950's or something?

All mammals have basically the same brain structure.

likely brain difference between men vs women > intra-race > between races

it isnt purely environmental, though. it is the effects of environent on evolutionary change. if you take asians from shit countries and send them to the US, they thrive. If you take africans from shit countries, or hispanics from shit countries, and send them to the US, they struggle.

>genetic bottlenecking
>founder populations
>genetic mixing
>nutrition
>diet
>distance to large bodies of water
>agriculture
>idion prevalence
>culture
>mate selection
>disease

all cars have the same shape
all airplanes have same basic shape

differences in the details lead to huge performance differences

a quad flat pack CPU from 40 years ago has the same shape as a QFP chip today, but the modern variant is a million times faster.

>t. I parrot other people's ideas because I'm too much of a brainlet to come up with any of my own

You managed to convert memespeak into an entire paragraph pretending to be scientific.

Well done.

you might find this interesting
audubon.org/news/in-woodpeckers-brain-size-depends-complexity-their-interactions

>Evolution doesn't have a 'purpose', it just is.

woah
x-posting this to TIL asap

Actually living in a non-urban environment in a more traditional, less specialised fashion is conducive to a more intelligent brain, urban environments aren't complex, you literally don't have to know anything except how to be cashier and you can get by. You don't need to know how the other integral parts of your life are produced (like the food that keeps you alive), it has been like this since widespread agriculture, which opens the ability of specialisation, which lead to our present world.

Our ancestors living in caves and plains were not retards, that had complex and varied knowledge, more knowledgeable and physically capable than most people today. Sure they didn't have deep fields of study but they had pretty much whole encyclopedias of flora, fauna, terrain and dozens of skills, contained within each mind. Those who didn't, did not survive. The IQ disparate today comes from varied education levels, report/assessment methods and culture. We are probably getting dumber.

>Is it known why different races have varying brain structure and development?

Populations will deviate in certain manners when isolated. There's not always a specific reason, but I'd imagine something such as one or several droughts or food shortages caused a certain type of characteristic to be quite advantageous; perhaps this characteristic caused an increase or decrease in hereditary brain power possibility. Thus changing the populations' brain power

You can also look to cultural differences that may have led to certain individuals being culled, such as with heavy totalitarianism (ie. people who speak out or think a different way are killed in order to maintain political power). It wouldn't make a huge difference immediately, but over a few generations if this sort of behavior continued, one might start to notice the spread of "hereditary compliancy" (for lack of a better term) and perhaps this is connected to brain ability

tl;dr there's a million billion possibilities. It's really quite hard to say.

I know I'm pissing into a sea of piss but there are no discernible brain differences between races just as there are no major differences in any other vital organ. Traits present in the genome of crucial body parts are highly conserved over time, so much so we have much the same organ layout as the frog despite our species branching off many millions of years ago. The suggestion that there could be a discernible difference in something as vital as the brain of all things in as few as tens of thousands of years is absolutely preposterous and is the sole reason no one in academia takes the idea seriously. Our genome is simply far too stable in that regard.

>something as vital as the brain
uh

You are a laughable wannabe cuckold.

>the reason for athletic ability of American blacks is the fact southerners literally bred them like cattle
explain why Kenya produces such amazing runners then
(he can't)

Cold enviroments make brains run better just like a CPU, it's why Mediterraneans earn all their banter.

lolbritun

East Africans have specialized in distance running and West Africans, from which American blacks are extracted, for sprinting. It's type I vs II muscle fibers.

>there are no discernible brain differences between races just as there are no major differences in any other vital organ
Just like there's no difference between skin color and skull shaped between races. Skin being a vital organ, it's obviously not going to vary from race, and likewise, the genetic description of our bones being far to stable for any significant difference.

Because skull shapes aren't exclusive to race at all let alone stuff like skin colour and noses/eyes.

Not true, there is ONE tribe in East Africa who has produced all the "East African" marathon runners. Most East Africans are no better at long distance running than anyone else.

this
evolution is just best traits based on enviourmental factors. so it "just is" is correct. bunch of butthurts replying to you even tho being correct

so simple, so true

t. I parrot arguments and words because i'm to much of a brainlet to come up with any of my own

Basically this^

Just like Ashkenazi Jews the Kalenjin Africans represent a small sub-population with a "high" populated outlier trait.

>race doesn't real
What an argument you've got there.

>these comment sections
>comment sections
Reddit is that way =====>

The difference really isn't that big. Controlled for all environmental influences the span of human intelligence varies by around 20 IQ points (e.g. difference between asians and blacks is 20 IQ points whites are somewhere inbetween). That's really not that much and for example other specs like body size varies much more between humans (Northern europeans are 180cm average height, some pacific tribes are like 150cm).

Btw, low average intelligence is not really that bad. Theoretically, the most efficient way to organize a society is by having one smart guy on 10 dumb people, and one genius for 1000 smart guys.The smart guy rules and controls the dumb people, and the genius rules and controls the smart people.

That's just what the White man used to look like before the Illuminati made the frogs gay

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misleading chart
white scores are not representative

>not an argument
>also not an argument
/pol/acks are apparently irony-blind