This revolutionary idea of Western citizenship—replete with ever more rights and responsibilities—would provide superb manpower for growing legions and a legal framework that would guarantee that the men who fought felt that they themselves in a formal and contractual sense had ratified the conditions of their own battle service. The ancient Western world would soon come to define itself by culture rather than by race, skin color, or language. That idea alone would eventually bring enormous advantages to its armies on the battlefield. (p. 122)

- Victor Davis Hanson