The Terror of History: Solar Eclipses and the Origins of Social Complexity and Complex Thinking

Our research advances the hypothesis and empirically establishes that a higher incidence of solar eclipses is associated with higher social complexity and complex thinking in premodern societies. We construct a novel dataset of solar eclipses' incidence at the ethnic-group level, bringing together a wide range of historical, ethnic and GIS data sources. We exploit variations in the exposure to solar eclipses in a set of 1267 ethnic groups derived from Murdock's 1967 Ethnographic Atlas. Variation in the exposure to total eclipses is exogenous, as eclipses are randomly and sparsely distributed all over the globe. Moreover, unlike other natural phenomena, solar eclipses do not destroy capital