Interestingly enough, a coworker recently told me that I likely don't have much room for advancement at my employer, given my race. He said look at the race of the people on the ladder above you (it's mostly one race), and then look at yourself.
Also, being tall. Easiest way to identify management is height.
Honestly this brings tears to my eyes. It's like humans would never get past that obstacle and unlock the next level cooperation..
Even more frustrating is that in many ancient empires, racism essentially didn't exist. The trans-Atlantic slave trade was a big driver of it, as a way to "justify" the evil.