Here are the rules for writing a rule so powerful it sets the culture for many years: It must be memorable. If people forget the rule, they forget the culture. It must raise the question “Why?” Your rule should be so bizarre and shocking that everybody who hears it is compelled to ask, “Are you serious?” Its cultural impact must be straightforward. The answer to the “Why?” must clearly explain the cultural concept. People must encounter the rule almost daily. If your incredibly memorable rule applies only to situations people face once a year, it’s irrelevant.
