He found that in the period between 1816 and 2005 there were 205 wars between non-democracies, 166 wars between non-democracies and democracies, and no wars between democracies.
他發現在1816-2005年間，非民主國家之間總共發生了256戰爭，非民主國家與民主國家之間則有156場，但民主國家之間則一場戰爭也沒有發生過。