David, most republic fail for other reasons than social injustice. For example, the Roman republic failed not because of the injustices of the Roman society. Rather it fell because the Senate failed early on to create a national army loyal to the State(the senate); that resulted in private funding of legions that are loyal to their pay master; and thus given rise to men like Marius, Sulla, Pompey and Caesar.
As for the fall of Chinese dynasties, the seed of failure was not rich/poor disparities; but rather a refusal to modernize. That seed of destruction was laid in about a couple of hundred of years before Qing actually fell. The collapse of the economy was due to the lack of technology to resist foreign advancements and unfair trades resulting from that.
Instead, if China followed Japanese example and modernized, it would have been an entirely different 19th and 20th century in China.
As for the fall of Chinese dynasties, the seed of failure was not rich/poor disparities; but rather a refusal to modernize. That seed of destruction was laid in about a couple of hundred of years before Qing actually fell. The collapse of the economy was due to the lack of technology to resist foreign advancements and unfair trades resulting from that.
Instead, if China followed Japanese example and modernized, it would have been an entirely different 19th and 20th century in China.