Charles Tilly, "War Making and State Making as Organized Crime," in Theda Skocpol and Peter Evans, eds., Bringing the State Back In. New York: Cambridge University Press, 1985, pp. 169-191.

Mancur Olson, “Dictatorship, Democracy, and Development,” The American Political Science Review 87(3): 567-576 (September 1993).

Douglass North and John Joseph Wallis , “Defining the State ,” Mercatus Center Working Paper 10-26, George Mason University, June 2010.

Jacob L. Weisdorf, "From Foraging To Farming: Explaining The Neolithic Revolution," Journal of Economic Surveys 19(4): 561-586, 2005.

Robert C. Allen, “Agriculture and the Origins of the State in Ancient Egypt,” Explorations in Economic History 34(2): 135-154 (April 1997).

J. G. Manning, "The Nile Flood Cycle and the Collapse of Egyptian Civilization," PERC Research Paper No. 12/1 (April 17, 2012).