First let me start out with my claim: Humans do not cluster into racial categories
Reasons why: SCIENCE and BIOLOGY
The scientific justification for race has been debunked for decades, not because of social implications, but because of the evidence in the genetic variation between human populations. There are more variation within a race than between. There are populations in Africa have more variation between them than populations between Europeans and Asians.
We can delve into this topic in many ways. We can conclude that humans cannot cluster into discrete biological categories using traits such as blood, immune system, genetics, body shape and size, skin color, and skull shape. I can argue why for any if you want.
This is not to say there's not variation at all and that we're "all the same" because there are genetic differences between populations, however these differences account for little of the variation between human populations.
