Factionalism was a factor in the fall of the Song Dynasty
Factionalism was a factor in the fall of the Ming Dynasty
Factionalism was irrelevant compared to other factors
An-Lushan rebellion weakened the central bureaucracy
Needs support/cites. The average person was screwed in China from at least 1000AD till 1950.
However, having looked at the Quora thread, I agree there's none there either.
The average person's dissatisfaction and poor living conditions were better predictors of the fall of a dynasty
This appears to be a frequent occurence in Quora's history section
Sustained infighting and factions in the emperor's court
Wikipedia article on the Song (linked to in Quora thread)
Factionalism weakened the dynasty at a critical point
Wikipedia article on the Ming Dynasty (linked to in thread)
Robin Daverman's Answer to Quora Thread
As this is the only RPC study I've found following health of recipients for a sustained period, the result suggests broad confirmation bias
The Available Evidence Strongly Indicates Flu Vaccines Often Damage Immune Systems of Recipients, Especially in Children.