A map of the world in 1000 BCE illustrating:
nomadic pastoralists (purple)
simple farming societies (green)
complex farming societies/chiefdoms (orange)
state societies (blue)
Based on Wikipedia content that has been reviewed, edited, and republished.
Original image by Electionworld. Uploaded by Mark Cartwright, published on 23 February 2013 under the following license: Creative Commons: Attribution-ShareAlike. This license lets others remix, tweak, and build upon your work even for commercial reasons, as long as they credit you and license their new creations under the identical terms.