The greatest periods in human histoty have involved the mass importation of ethnic knowledge from abroad. The Renaissance was essentialy the importation of Roman and Greek and especially Asian knowledge and ways of thinking & governing. Asians today are spending their lives accumulating new forms of knowing some detrimental to their ethnicity others cut off from ethnicity by colonialism just learning to reformulate their selves.
The past is rich and deep, it is full of ethnicities worth assuming and models of society and government far more well thought than many today, but because we sit at the top of the heap, we assume the past is inferior. The Western now is full of hubris, we think we are the most tolerant, the most open, the most humane etc, but It was the periods where the present had humility to the past that gave the present its most advanced and complicated forms and its greatest openess to its own potentiality.