Replication data for: Machiavelli's Legacy: Domestic Politics and International Conflict

Research examining the effect of regime type on conflict has focused on the democracy/autocracy continuum expounded in the political philosophies of liberal thinkers such as Kant and Schumpeter. While this concentration has yielded impressive results (democratic peace), it seems plausible that other conceptions of regime type may yield similar success. This paper examines the philosophy of Machiavelli and develops a measure of his "imperial regimes." These states, which can either be democratic or autocratic, should exhibit an increased propensity to initiate international conflict. Testing this contention in Renaissance Italy (1250–1494) and the modern international system (1920–1992), this paper finds strong empirical support. Machiavelli's views illuminate key differences between democracies and autocracies that have been previously overlooked. Thus, it deepens rather than replaces our conception of how domestic institutions affect international conflict.