your chinees high growth rate and high technology can not escape your laborer and miners death in accidents in chinees mines and factories which is highest in the world in china.
your list of strongest empires is not right. Indus Vally civilization have more area than Akkadian Empire but we can non know those ruling system and in Indian subcontinental some empire more powerful than Mughal Empire like moryan guptas cholas etc. and in this list some other empire like...