In the article, recently published in the February issue of Current Anthropology, Frachetti argues that early pastoral nomads grew distinct economies across the steppes and mountains of Eurasia and triggered the formation of some the earliest and most extensive networks of interaction in prehistory. The model for this unique form of interaction, which Frachetti calls "nonuniform" institutional complexity, describes how discrete institutions among small-scale societies significantly impact the evolution of wider-scale political economies and shape the growth of great empires or states.

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