Please include the following text in any publication using these data:
This research employed data from the Seshat Databank (seshatdatabank.info) under Creative Commons Attribution Non-Commercial (CC By-NC SA) licensing.
Turchin, P., R. Brennan, T. E. Currie, K. Feeney, P. François, […] H. Whitehouse. 2015. “Seshat: The Global History Databank.” Cliodynamics 6(1): 77–107. https://doi.org/10.21237/C7clio6127917.
Mullins, D., D. Hoyer, […] P. Turchin. Preprint. “Mullins, D., D. Hoyer, […] P. Turchin. 2018. “A Systematic Assessment of ‘Axial Age’ Proposals Using Global Comparative Historical Evidence.” American Sociological Review 83(3): 596–626. https://doi.org/10.1177/0003122418772567.
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.