Explaining patterns in the onset of interstate war

Over the past 30 years empirical international relations has discovered a number of conflict patterns which are variously considered to be competing, contradictory, or emanating from unique processes. I present a simplified and corrected selectorate model of war which unifies four such lines of research: the autocratic, democratic, and capitalist peaces with diversionary war. It is shown that domestic political competition, as understood within the selectorate approach, contains microfoundations for context conditional risk preference as a rationalist explanation for war. This novel mechanism, in turn, coherently explains the main findings from these various areas of enquiry. And so the discoveries of these four lines of enquiry can be understood not as apparently accidental or competing patterns but as aspects of the same mechanism operating under different empirical contexts.