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  2. Demography of the Roman Empire - Wikipedia

    en.wikipedia.org/wiki/Demography_of_the_Roman_Empire

    Life expectancy at birth in the Roman Empire is estimated at about 22–33 years. [9] [notes 1] For the two-thirds to three-quarters of the population surviving the first year of life, [10] life expectancy at age 1 is estimated at around 34–41 remaining years (i.e. expected to live to age 35–42), while for the 55–65% surviving to age 5, life expectancy was around 40–45. [11]

  3. Life expectancy - Wikipedia

    en.wikipedia.org/wiki/Life_expectancy

    Life expectancy development in some big countries of the world since 1960 Life expectancy at birth, measured by region, between 1950 and 2050 Life expectancy by world region, from 1770 to 2018 Human life expectancy is a statistical measure of the estimate of the average remaining years of life at a given age.

  4. 4th century BC - Wikipedia

    en.wikipedia.org/wiki/4th_century_BC

    The 4th century BC started the first day of 400 BC and ended the last day of 301 BC. It is considered part of the Classical era , epoch , or historical period . This century marked the height of Classical Greek civilization in all of its aspects.

  5. Longevity myths - Wikipedia

    en.wikipedia.org/wiki/Longevity_myths

    In one view, man was originally to have everlasting life, but as sin was introduced into the world by Adam, [18] its influence became greater with each generation and God progressively shortened man's life. [19] In a second view, before Noah's flood, a "firmament" over the earth (Genesis 1:6–8) contributed to people's advanced ages. [20]

  6. Medieval demography - Wikipedia

    en.wikipedia.org/wiki/Medieval_demography

    During the period from 150 to 400, with the intermittent appearance of plague, the population of the Roman Empire ranged from a high of 70 to a low of 50 million, followed by a fairly good recovery if not to the previous highs of the Early Empire. Serious gradual depopulation began in the West only in the 5th century and in the East due to the ...

  7. British Iron Age - Wikipedia

    en.wikipedia.org/wiki/British_Iron_Age

    The Battersea Shield, c. 350–50 BC. The British Iron Age is a conventional name used in the archaeology of Great Britain, referring to the prehistoric and protohistoric phases of the Iron Age culture of the main island and the smaller islands, typically excluding prehistoric Ireland, which had an independent Iron Age culture of its own.

  8. Demographics of Greece - Wikipedia

    en.wikipedia.org/wiki/Demographics_of_Greece

    Life expectancy: 81.9 years (2024 est.) • male: ... The population estimates on the Greeks during the 4th century BC, ... 400 046 797 084 7.46 45–49 388 226

  9. Estimates of historical world population - Wikipedia

    en.wikipedia.org/wiki/Estimates_of_historical...

    For the period of Classical antiquity to the Middle Ages, roughly 500 BC to AD 1500, there was also a general tendency of growth (estimated at a factor 4 to 5 over the 2,000-year period), but not strictly monotonic: A noticeable dip in world population is assumed due to the Black Death in the mid-14th century.