Please include the following text in any publication using these data:

This research employed data from the Seshat Databank ( under Creative Commons Attribution Non-Commercial (CC By-NC SA) licensing.

and cite:

Turchin P. et al. 2015. Seshat: The Global History Databank. Cliodynamics 6(1):77–107.

Turchin P. et al. 2017. Quantitative historical analysis uncovers a single dimension of complexity that structures global variation in human social organization. PNAS

The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official positions, either expressed or implied, of the Seshat Databank, its collaborative scholarly community, or the Evolution Institute.


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