Why do you think slavery was so much more prominent in Greco Roman civilization then in India or China

India and China claim few slaves with a lion's share of their populace as the low class that did likewise fill in as the slaves. The Indians and Chinese were not noticeable in bondage as the Greco-Romans since they had their kin taking the necessary steps that the slaves did. The Chinese and Indians one might say had slaves it was quite recently that the slave was called something different and held a higher economic wellbeing than simple slaves.