I wish you were right, but I think you are wrong. This article on poverty in ancient Rome suggests otherwise: https://en.wikipedia.org/wiki/Poverty_in_ancient_Rome "Their society may have consisted of a handful of wealthy individuals that made up 0.6% of the population, an army that made up 0.4% of the population, and the poor masses that made up 99% of the populace." I selected Rome because it's my understanding that this is one of the longest lived empires.
The facts for the Roman Empire are not clear, but it looks like massive inequality is the sad default mode for humanity. One might expect that as literacy and information sharing improved, it would be less tolerable by the populace for this inequality to persist. But it seems about as bad as ever. This may be due to the perception that rich people because they "earned" it, despite the fact that it seems patently obvious (to me at least!) that is not the case.