[inglor_cz]

"Rich nations inherited the loot from slavery, and used it to power their innovation."

The correlation between contemporary richness and former slavery is pretty weak. Many innovative countries like Ireland, Finland, Estonia, Taiwan or South Korea used to be actually subjugated to bigger empires. Meanwhile, no one considers Portugal, a major global power during the slavery era, rich or innovative.

Even in the US, the Deep South was technologically backward, which was one of the reasons why they actually lost the Civil War. If you have servants working on you, what is your motivation to study, tinker and innovate? Similar countries of today (such as Saudi Arabia) mostly spend their own loot of slavery on conspicuous consumption.