You start off wrong. I made the statement that many castles were built before the 15th century. That's true. If you want to verify it, do so on your own time. My actual response to you was that you were incorrect about Europeans not having castles at the time. I only needed one example to prove you wrong and I gave you Dover Castle as an example. The Moors had a presence in England but they never ruled there. If you say they do, then you're going to need to show and prove.
We can have a scholarly debate where we're both digging up sources to back our claims or we can have a casual discussion where we drop the knowledge we have. My issue with you is that you're making and have been making all these wild claims (like saying the moors ruled England) and you've never posted any proof, but when I disagree with you, then all of a sudden my claims are invalid because I'm not posting sources. Here's a paper about how the Slave Trade weakened Africa while simultaneously empowering Europe opening the way for colonization. Now you start proving some of the stuff you said. Show me your paper that proves that Europe didn't have any castles not built by Moors when the Slave Trade started.
For the second time, I never said we were catching up to whites or Asians. If I sound like a 60 minutes reporter then you sound like someone on FOXNews with your need to mischaracterize the opposing viewpoint. Those numbers I threw out were never meant to be taken literally. They were presented for the sake of argument. The average income in Jackson is around 19K. The Jackson cost of living index is 82% of the national average (
https://www.bestplaces.net/cost_of_living/city/mississippi/jackson). The average income in San Francisco is around 61K. The cost of living is 269% of the national average (
https://www.bestplaces.net/cost_of_living/city/california/sanfrancisco). So, you make a hell of a lot more money in San Fran, but the cost of living is a hell of a lot higher so the average person in San Fran isn't necessarily doing better.
This what a population map for African Americans looks like:
This is how white people are distributed
Here are Asian people:
Look at Asians, they are clustered in places like San Francisco and Los Angeles where both the pay and cost of living are high. Blacks are clustered in the southeast. So if you just do a rough average for each race, you're going to expect that Asians have a higher income per captia, but that doesn't necessarily mean that the average Asian is doing better. Again, I'm not saying blacks are doing as well as Asians. I'm just saying that the issue is more complicated than just putting some averages and calling it a day.