In a path-breaking article, Wade Huntley (1996) reinterpreted Immanuel Kant’s pacific union as a systemic phenomenon. Huntley’s argument spawned a new wave of inquiry into the evolutionary expansion of the democratic peace, with several empirical studies finding a positive relationship between global democracy and systemic peace (e.g. Crescenzi and Enterline 1999; Gleditsch and Hegre 1997; Kade...