Is there a scientific explanation why sub-saharan africans are so retarded?

Is there a scientific explanation why sub-saharan africans are so retarded?

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/pol/ pls go

Is there any reason why white people have the second lowest average IQ? They're behind Jews, asians, and middle eastern people.

Honestly we should just get rid of them tbhfam.

source

Lack of obstacles and essential nutrients to evolve them

Stoo being retarded, it doesnt take a Tao to realise that different environmental conditions lead to different development, whites had scarcity and freezing temperatures which strongly drove them develop shelter, clothing and agriculture.

Then slavery made blacks all Einstein's

>Hey Rog, me thinking I start catching fish, for fun
Rog stupid, why catch fish when tribe just kill zebra
>Rog dont know, what if zebra run out
Why zebra run out? There nothing but grass here, and tribe kill all sharptooth
>Rog dont know what Rog was thinking, Rog forget about it

>ROGNAR HUNGRY AND COLD!!!
WHAT UGTAK SUPPOSED TO DO ABOUT IT?!! UGTAK HUNGRY AND COLD TOO!!

Einstein
>Jewish
Von Neumann
>Jewish
Oppenheimer
>Jewish
Feynman
>Jewish
Erdős
>Jewish
Witten
>Jewish

Why have white people contributed so little to science and technology?