Why Did Eurasians Prosper? (Environmental Determinism).

In the old days, a simple belief in genetic superiority was generally accepted.

Then people said that was racist.

So the theory of environmental determinism was put forward (https://en.m.wikipedia.org/wiki/Environmental_determinism) but that was eventually called racist too.

Then the theory was revived by people such as Jared Diamond in his book Guns, Germs and Steel (https://en.m.wikipedia.org/wiki/Guns,_Germs,_and_Steel) but again accused of racism.

Some fools have tried to argue that the less advanced cultures have been unfairly described as less advanced and were in fact, equally advanced in their own ways but... this is fücking hilarious horse shït.

So what's the explanation?

Why did the Asian, Caucasian and Oriental peoples develop so far and so much while the Africans, south Americans and aborigines... did not?