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The oldest human could still live to be over 100 just as they do today. This was of course much rarer. Here's some data from the University of Texas on the matter. Infant Mortality by that page was 31.9% considerably worse than even the worst of the world 60 years ago. This was skewed by infanticide and such.

Expanding on @MonsterTruck's comment above, China (especially the east part) is really good for food production. According to Wikipedia's list of countries by agricultural output China has 17 per cent of global agricultural production today, compared to around 7 for the European Union, 7 for India and 4 for the United States. I would expect the construction ...

A recent report by USAID offers a brief but insightful view on some of current research on 'Youth Bulge' hypothesis. Some of the key take-away are: The common thread across the latest research is that youth bulges alone do not cause conflict. Rather, when unstable politics and social deterioration are combined with large numbers of disadvantaged young men, ...

I'm sorry to throw a PhD dissertation at you. But I believe Food shortages and economic institutions in the Democratic Peoples' Republic of Korea addresses your concerns. From page 168 (179 on the freely viewable pdf). Addresses whether there was a famine using the accounts you have hinted at as well as UN figures, with comparison to official DPRK figures. ...

China is the world's third largest country in size, after Russia and Canada. The latter two are further north, much colder, and less hospitable to population growth. China is one of the world's oldest civilizations. Others, such as Egypt, Babylon, and even India are much smaller in size. The combination of large land area (in a mostly temperate climate) ...

Going by the birth rate data, it would seem that there was little change in the birth rate between 1910 (30.1 per 1,000), 1915 (29.5 per 1,000) and 1920 (27.7 per 1,000). It can be argued that the war didn't affect the population at all in that respect. However, another explanation can be that there are two conflicting forces working simultaneously. For ...

World War I did not produce a Baby Boom, because the so-called "Lost" generation that fought it was ALREADY a Baby bust generation. The war just exacerbated the effect of this cohort producing fewer children. World War II had a LIBERATING effect on Americans. Women (included married women) had somewhat stopped sleeping with their husbands during the ...

According to Colin McEvedy, in 737 after the Muslim Conquest of Spain, the population on the peninsula was around 4 million. Nearly all of that would have been in Muslim-held territory, as there simply wasn't much else but a couple of little strips of land in the mountainous northern coastal region. Toledo was the only city of any real size in Western Europe ...

I could add a few Farming technology. Ancient chinese farming technology is about as advance as post industrial revolution in Europe. Chinese farm all years. Europeans do not have good irrigation system. Ancient chinese cultures measure prosperity by population growth. The idea is if you govern well, people will come to you (like people flocking US and ...

The Wikipedia article on Al Andalus mentions this: Arabs, and Berbers comprised eighty percent of the population of Al-Andalus by around 1100. BTW as well as this: Jews constituted more than five percent of the population. If you are looking for a source published in book form, I would recommend Ibn Khaldun: The Mediterranean in the 14th ...

Louis I. Dublin says ...the maximum birth rates in the immediate post-war years were usually below the pre-war average and in practically all countries the long-term downward trend already in evidence before the war was resumed. A considerable part of this later decline reflects the reduction in the number of potential fathers -the young men ...

A (male) youth bulge sometimes occurs when the birth rate is FALLING. That's because most men prefer to marry women younger than them. So if the birth rate is falling, there are more older men of the earlier period than younger women of the later period. This happened with American cohorts born in the 1960s (and in certain other parts of the world). One ...