1. Of course not, I referenced unintelligent wealthy people ("dumb nobility") in my post.
2. 70% of rich families lose their wealth by the second generation, 90% by the third. [A]
3. IQ is a greater predictor of income than parental SES. Someone in the 95th percentile for IQ has a higher EV for earnings than someone born into the 95th percentile for wealth.
4. A number of revolutions have happened. If you don't believe that modern France or Japan are freer than their feudal predecessors then I agree that we are probably not on the same page.