Fastest runners in the world throughout history:


Usain Bolt - Black
Justin Gatlin - Black
Yohan Blake - Black
Asafa Powell - Black
Nesta Carter - Black
Mayrice Greene - Black
Steve Mullings - Black
Richard Thompson - Black

You’re saying this isn’t genetic? That it was caused by.. discrimination? Or slavery?

Seems like evidence of genetic differences to me. I can’t imagine environmental could cause such a consistent result.

Of course there is variation amongst racial groups, but we’re talking about averages.