That's fair, I removed it. I would maintain that's its accurate nonetheless. If I had taken more time, I'd probably have reworded it as 'the most powerful, systematic, and enduring racist society in world history.' Sentiments don't easily translate into quantifiable research variables and it was sloppy to include them.

I have in mind overt public displays of horror inflicted on individuals in countries outside the US; these are often implicitly regarded as evidence of their power but the opposite is the case. Similar to public execution and torture in European feudalism was always a sign of a weak state. My impression is that you might already be familiar with this line of reasoning but for those who have not, such claims will appear to take off from the planet.