A piece of evidence from the period after 1750 that could challenge the author's argument in the passage is the start of the French Revolution.
The French Revolution was said to have began in 5 May 1789. There are a lot of reasons for the revolution.
Note that the piece of evidence from the period before 1750 that would support the author viewpoint is that the West African and Swahili Coast Empires that is made up of the Timbuktu and Mali are said to be very powerful, as well as been rich, and prosperous than what they were said to have believed.
Conclusively, The empires were also said to have been involved in in Maritime and land trade with the other part of Eurasia.
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