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Wikipedia / 4th millennium BC

The 4th millennium BC spanned the years 4000 BC to 3001 BC. It marked a critical turning point in human history, characterized by the transition from late Neolithic agricultural societies into urban, state-level civilizations.

This millennium witnessed the invention of writing, the initial spread of bronze metallurgy, the adoption of the wheeled vehicle, and the rise of the first primary states in Mesopotamia and Ancient Egypt, effectively initiating recorded history.

The city states of Sumer and the (Predynastic) 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.

Culture

  1. Near East

  2. c. 3250 BC – Potter's wheel in use in Ancient Near East

Mesopotamia

Persian plateau

Anatolia and Caucasus

Egypt

Levant

Metallurgy during the Copper Age developed in Europe.

Pontic–Caspian steppe

Balkans

Malta

Northern and western Europe

3300 BC – Bronze Age starts in Indus Valley (Harappa).

The Americas were in the Meso-Indian (Archaic) stage.

Sub-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. 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

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.

Calendars and chronology

3761 BC –

  • Since the Middle Ages (12th century), the Hebrew calendar has been based on rabbinic calculations of the year of creation from the Hebrew Masoretic Text of the bible. This calendar is used within Jewish communities for religious and other purposes. The calendar's epoch, corresponding to the calculated date of the world's creation, is equivalent to sunset on the Julian proleptic calendar date 6 October 3761 BC.

  • 25th of Elul, 7 October 3761 BC — Considered the first day of creation from formless matter (Gen. 1.2), traditionally interpreted as out of nothing, on which the Bible recalls that God created existence, time, matter, darkness and light.

  • 1st of Tishrei, 12 October 3761 BC — Considered the sixth day of creation (Rosh Hashanah Day 1), on which the Bible recalls that God created Adam and Eve.

  • 3114 BC – One version of the Mayan calendar, known as the Mesoamerican Long Count, uses the epoch of 11 or 13 August 3114 BC. The Maya Long Count calendar was first used approximately 236 BC (see Mesoamerican Long Count calendar#Earliest Long Counts.

  • 3102 BC – According to calculations of Aryabhata (6th century), the Hindu Kali Yuga began at midnight on 18 February 3102 BC. Lasting for 432,000 years (1,200 divine years), Kali Yuga began years ago and has years left as of  CE. Kali Yuga will end in the year 428,899 CE.

  • 3102 BC – Aryabhata dates the events of the Mahabharata to around 3102 BC. Other estimates range from the late 4th to the mid-2nd millennium BC.

Notes

References