That the issue of slavery has weak explanatory power for what is happening today.

I didn’t ask you. But since you chose to get involved: do you believe there is no lasting impact or consequences resulting from slavery in the USA?

Pretty much everything that has happened in the past has consequences today. It's the butterfly effect.

Slavery has existed as far back as history. The idea that people are created equal, and are equal under the law, is very, very new, and that idea has resulted in a great many positive things happening.