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was founded in 2011 to bring together the most current and comprehensive body of knowledge about human history in one place. The huge potential of this knowledge for testing theories about political and economic development has been largely untapped.
systematically collects what is currently known about the social and political organization of human societies and how civilizations have evolved over time. This massive collection of historical information allows us and others to rigorously test different hypotheses about the rise and fall of large-scale societies across the globe and human history.