What historical conditions (culture, technology, events, etc.) contributed to China's current lead in population?
If their growth rate was comparable to the rest of the world over the past several millenia, then was it only a matter of having a "head start"? (If so, then how did this initial condition come to ...
I'm assuming the average life expectancy of a Roman did not change very much between 500 BC - 500 AD (?), as there was probably no significant progress in medical knowledge or nutrition. Do historians ...