Foreshadowing Mars: Religiosity and Pre-Enlightenment Warfare

Luke Barber, Michael Jetter and Tim Krieger

No 10806, CESifo Working Paper Series from CESifo

Abstract: Can religiosity sway a society’s propensity for violence against outgroups? We first introduce two state-year-level religiosity measures for several pre-Enlightenment European states with the frequencies of (i) religious language in book publications and (ii) Christian names of newborns. To identify causal effects on warfare, we exploit the local visibility of solar eclipses – phenomena orthogonal to climatic, cultural, economic, environmental, and institutional developments that, in pre-Enlightenment Europe, were overwhelmingly viewed as supernatural, religious events. Accounting for dyad- and year-fixed effects, we observe positive, statistically significant, and quantitatively sizeable effects on subsequent attack war onset. Reduced form estimates, robustness checks (e.g., acknowledging dyad-specific time trends), and placebo exercises yield consistent patterns. Exploring mechanisms, religious terminology explicit to religious outgroups (specifically Jews and Muslim) spikes in solar eclipse years and predicts attack war onset, particularly against Islamic states. Finally, consistent with the idea of a religious primer highlighting ingroup-outgroup demarcations and exacerbating tensions along such lines, city-year-level solar eclipses also predict (i) Jewish expulsions and (ii) witch trials in pre-Enlightenment Europe.

Keywords: religiosity; warfare; ingroup-outgroup demarcations; anti-Semitism; witch trials (search for similar items in EconPapers)
JEL-codes: D74 F51 H56 N33 N43 Z12 (search for similar items in EconPapers)
Date: 2023
New Economics Papers: this item is included in nep-his
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Working Paper: Foreshadowing Mars: Religiosity and Pre-enlightenment Warfare (2023)
Working Paper: Foreshadowing Mars: Religiosity and pre-Enlightenment warfare (2023)
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