The wonders of modern medicine and nutrition make it easy to believe we enjoy longer lives than at any time in human history, but we may not be that special after all.
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Taken altogether, life span in ancient Rome probably wasn’t much different from today. It may have been slightly less “because you don’t have this invasive medicine at end of life that prolongs life a little bit, but not dramatically different”, Scheidel says. “You can have extremely low average life expectancy, because of, say, pregnant women, and children who die, and still have people to live to 80 and 90 at the same time. They are just less numerous at the end of the day because all of this attrition kicks in.”
The biological aging process was the same as today, thus the longest lived Roman citizen was said to have lived to 112 years, a few years less in age to the oldest living men today. Difference was that due to lack of knowledge of how disiases were transmistted and lack of refrigeration for food and in general lack of vaccinations and modern concept of hygienization, the deaths from infections illnesses were much much higher. Average live expectancy in Greece might have reached close to 40 years in the Classical Period, very high for pre-modern standards.
From:
Economic Growth in Ancient Greece on JSTOR
We have the following data:
So, there was a pretty impressive increase in life expectancy in Ancient Greece, roughly from 900 BC to 400 BC. However, the most impressive piece of evidence is the level of material consumption in Classical Greece as shown by the size of the houses:
As Morris describes the evolution of housing quality in Ancient Greece:
The distribution of ground-floor area points out to a highly egalitarian level of consumption across households:
The level of inequality among citizens in Ancient Greece was similar to countries like Denmark, Norway and Sweden today. So, Classical Greece was a democratic, egalitarian, middle class society that enjoyed high level of prosperity whose fruits were enjoyed by the bulk of its population which typically resided in larger houses than Americans today. There is no evidence that a middle class societies like those existed in the Middle Ages until the flowering of the city states of Northern Italy in the Renaissance, and even then I do not expect that the general population was as prosperous as it was in Classical Greece.
In the Roman Empire the general level of prosperity was lower than the average for Classical Greece, but, for the central regions of the empire like Italy, Western Asia Minor, and Greece, archeological sites suggest that the level of prosperity per capita was similar to Classical Greece, but with more inequality and more slavery.