4th millennium BC explained

The 4th millennium BC spanned the years 4000 BC to 3001 BC. Some of the major changes in human culture during this time included the beginning of the Bronze Age and the invention of writing, which played a major role in starting recorded history.

The city states of Sumer and the kingdom of Egypt were established and grew to prominence. Agriculture spread widely across Eurasia.

World population growth relaxed after the burst that came about from the Neolithic Revolution. World population was largely stable in this time at roughly 50 million, growing at an average of 0.027% per year.[1]

Culture

Near East

See main article: Ancient Near East.

Europe

See main article: Neolithic Europe.

Central Asia
East Asia
Indian Subcontinent
Americas
Australia
Sub-Saharan AfricaSub-Saharan Africa remains in the Paleolithic period, except for the earliest neolithization of the Sahel following the desiccation of the Sahara in c. 3500 BC.[7] [8] As the grasslands of the Sahara began drying after 3900 BC, herders spread into the Nile Valley and into eastern Africa (Eburan 5, Elmenteitan). The desiccation of the Sahara and the associated neolithisation of West Africa is also cited as a possible cause for the dispersal of the Niger-Congo linguistic phylum.

Environment

See main article: Atlantic (period). Based on studies by glaciologist Lonnie Thompson, professor at Ohio State University and researcher with the Byrd Polar Research Center, a number of indicators shows there was a global change in climate 5,200 years ago, probably due to a drop in solar energy output.[9]

Calendars and chronology

Centuries

References

  1. Jean-Noël Biraben . Essai sur l'évolution du nombre des hommes . Population . 34 . 1 . 1979 . 13–25 . 10.2307/1531855 . 1531855. 143406315 ., estimates 40 million at 5000 BC and 100 million at 1600 BC, for an average growth rate of 0.027% p.a. over the Chalcolithic to Middle Bronze Age.
  2. Federico Lara Peinado, Universidad Complutense de Madrid: "La Civilización Sumeria". Historia 16, 1999.
  3. Roberts, J: History of the World. Penguin, 1994.
  4. Book: Dictionary of the Ancient Near East . 2000 . University of Pennsylvania Press . 9780812235579.
  5. Web site: World's Oldest Wheel Found in Slovenia . March 2003 . Government Communication Office of the Republic of Slovenia . Gasser, Aleksander . 2015-03-30 . https://web.archive.org/web/20160826021129/http://www.ukom.gov.si/en/media_room/background_information/culture/worlds_oldest_wheel_found_in_slovenia/ . 2016-08-26 . dead .
  6. http://www.australiangeographic.com.au/topics/history-culture/2016/03/top-7-aboriginal-rock-art-sites/ Australia's top 7 Aboriginal rock art sites
  7. The demographic response to Holocene climate change in the Sahara . Quaternary Science Reviews . 101 . 28–35 . 10.1016/j.quascirev.2014.07.003 . 2014 . Manning . Katie . Timpson . Adrian . 2014QSRv..101...28M . https://ghostarchive.org/archive/20221009/http://discovery.ucl.ac.uk/1450029/1/1-s2.0-S0277379114002728-main.pdf . 2022-10-09 . live . free.
  8. Igor Kopytoff, The African Frontier: The Reproduction of Traditional African Societies (1989), 9–10 (cited after Igbo Language Roots and (Pre)-History, A Mighty Tree, 2011).
  9. Web site: Major Climate Change Occurred 5,200 Years Ago: Evidence Suggests That History Could Repeat Itself . 2004-12-17 . dead . https://web.archive.org/web/20080115112153/http://www.news-about-space.org/story/2409.html . 2008-01-15 .
  10. Fairbridge . Rhodes W. . 1961 . Eustatic Changes in Sea Level . Physics and Chemistry of the Earth . 4 . 99–185 . 10.1016/0079-1946(61)90004-0. 1961PCE.....4...99F .
  11. Book: Colin . Murray-Wallace . Colin . Woodroffe . Quaternary Sea-Level Changes: A Global Perspective . Cambridge University Press. 2014 . 338. 9781139867153 .
  12. Thompson . L. G. . Mosley-Thompson . E. . Brecher . H. . Davis . M.. León . B.. Les . D. . Lin . P. -N. . Mashiotta . T. . Mountain . K. . Inaugural Article: Abrupt tropical climate change: Past and present . Proceedings of the National Academy of Sciences . 103 . 28 . 10536–10543 . 2006 . 10.1073/pnas.0603900103. 16815970 . 2006PNAS..10310536T . 1484420 . free .
  13. Web site: Major Climate Change Occurred 5,200 Years Ago: Evidence Suggests That History Could Repeat Itself . Science Daily. 19 December 2010.
  14. Book: Dershowitz . Nachum . Nachum Dershowitz. Reingold . Edward M. . Edward M. Reingold . Calendrical Calculations . Calendrical Calculations . 1st . Cambridge University Press . 1997 . 978-0-521-56474-8 . 11 .