A civilized society's first line of defense is . . . customs, traditions, rules of etiquette and moral values

Culture and Social Pathology by Walter E. Williams.

A civilized society's first line of defense is not the law, police and courts but customs, traditions, rules of etiquette and moral values. These behavioral norms — mostly transmitted by example, word of mouth and religious teachings — represent a body of wisdom distilled over the ages through experience and trial and error. They include important thou-shalt-nots, such as thou shalt not murder, thou shalt not steal and thou shalt not cheat. They also include all those courtesies that have traditionally been associated with ladylike and gentlemanly conduct.