The 4th millennium BC saw major changes in human culture. It marked the beginning of the Bronze Age and of writing.
The city states of Sumer and the kingdom of Egypt were started and grew to prominence. Agriculture spread widely across Eurasia. World population in the course of the millennium doubled to approximately 7 to 14 million people in the area surrounding them.
3600 BC—Construction of the Ġgantija megalithic temple complex on the Island of Gozo, Malta: the world's oldest extant unburied free-standing structures, and the world's oldest religious structures. (See Göbekli Tepe for older, buried religious structures.)
3600–3200 BC—Construction of the first temple within the Mnajdra solar temple complex on Malta, containing "furniture" such as stone benches and tables, that set it apart from other European megalith constructions.
3600–3000 BC—Construction of the Ta' Ħaġrat and Kordin III temples on Malta.
3500–2340 BC—First cities developed in Southern Mesopotamia. Inhabitants migrated from north.
The cuneiform script proper emerges from pictographic proto-writing in the later 4th millennium. Mesopotamia's "proto-literate" period spans the 35th to 32nd centuries. The first documents unequivocally written in the Sumerian language date to the 31st century, found at Jemdet Nasr.
The Maya calendar dates the creation of the Earth to August 11 or August 13, 3114 BC (establishing that date as day zero of the Long Count 13.0.0.0.0).
According to calculations of Aryabhata (6th century), the HinduKali Yuga began at midnight (00:00) on 18 February 3102 BC. Consequently, Aryabhata dates the events of the Mahabharata to around 3137 BC.
7 October 3761 BC—Epoch of the Hebrew Calendar (introduced in the 12th century).
↑See horoscope number 1 in Dr. B. V. Raman (1991). Notable Horoscopes. Delhi, India: Motilal Banarsidass. ISBN81-208-0901-7.
↑Arun K. Bansal's research published in Outlook India, September 13, 2004. "Krishna (b. July 21, 3228 BC)". Archived from the original on April 26, 2009. Retrieved January 27, 2013.
↑Annals of the World, as well as the above sources
↑IVP New Bible Commentary page 22 states the events of Genesis 1–11 took place before 2000 BC