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20s

Third decade of the first century AD

20s
Summary

Third decade of the first century AD

the years AD 20–29

Lucius Aelius Sejanus

The 20s decade ran from January 1, AD 20, to December 31, AD 29.

In Europe, the 20s saw revolts by the Aedui, Thracian tribesmen, and the Frisians against the Roman Empire. In North Africa, Tacfarinas, a Numidian Berber deserter, led the Musulamii tribe and a loose and changing coalition of other Berber tribes in revolt, before being defeated in AD 24. In China, the Xin dynasty collapsed and the Eastern Han dynasty was established. In Korea, Daemusin of Goguryeo annexed Dongbuyeo and killed its king Daeso.

In science, the 20s saw the manufacture of pens and metal writing tools in Rome. Major disasters of this decade include a fire in Rome, and the collapse of a poorly built amphitheatre in Fidenae, which killed 20,000 of the 50,000 spectators. In 27, Christianity originates from Judaea as a Jewish Christian sect of the Second Temple Judaism. Geographica, an encyclopedia of geographical knowledge created by Strabo, was finished no later than AD 23.

Manning (2008) tentatively estimates the world population in AD 20 as 246 million.

Demographics

Main article: Estimates of historical world population

Due to lack of reliable demographic data, estimates of the world population in the 1st century vary wildly, with estimates for AD 1 varying from 150 to 300 million. Demographers typically do not attempt to estimate most specific years in antiquity, instead giving approximate numbers for round years such as AD 1 or AD 200. However, attempts at reconstructing the world population in more specific years have been made, with Manning (2008) tentatively estimating the world population in AD 20 as 246 million.

Significant people

  • Tiberius, Roman Emperor (AD 14–37)

References

References

  1. [http://www.thesocialcontract.com/artman2/publish/tsc0403/article_329.shtml John H. Tanton, 1994, "End of the Migration Epoch? Time For a New Paradigm", The Social Contract, Vol. 4 (no 3), pp. 162–173].
  2. Haub (1995): "By 1 A.D., the world may have held about 300 million people. One estimate of the population of the Roman Empire, from Spain to Asia Minor, in 14 A.D. is 45 million. However, other historians set the figure twice as high, suggesting how imprecise population estimates of early historical periods can be."
  3. Manning, Scott. (2008-01-12). "Year-by-Year World Population Estimates: 10,000 B.C. to 2007 A.D.".
Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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