Analysis of information sources in references of the Wikipedia article "Mores" in English language version.
Rome was thus not only an honor culture, but a contest culture... Romans competed both with the living and the dead. They strove to not only live up to the good name of their ancestors, but to surpass them in glory. And while we moderns think it gauche to compete with one's family and friends, the Romans thought these peers made the best fellow competitors, for they were equals with whom one shared the most in common... Romans competed over who was most skilled and excellent in rhetoric, in sports, in war, in wealth, and in virtue — particularly the defining quality of manhood: courage... The Roman legionary strove not only for personal honor, but for public recognition; ancient Rome offered many different awards and commendations, and soldiers competed strenuously for them all.
A Roman could win such a "competition" by pointing to past evidences of their honor; this was a culture in which politicians shamed political opponents or bolstered the credibility of their own arguments by tearing open their tunic to reveal scars earned in defense of the republic. Or, a critic might be refuted by one's performance in a fresh showdown in which one's bona fides could be plainly demonstrated.
An honor culture can only function in a society in which there is a shared code - clear rules, standards and expectations for interaction and engagement - and within a closed community of equals.