A country with rather rigid castes and 40,000 endogamous groups is likely never going to be high trust. "Colonialism" if anything cut against these two facts.

A country with rather rigid castes and 40,000 endogamous groups is likely never going to be high trust. "Colonialism" if anything cut against these two facts. Don't know about China, but they do have an issue with colonialism going back centuries and centuries, even if the Han culture eventually "conquered" the invaders.