[AlexanderHowl]

I do not believe that unmemes exist. Meme complexes are either endogamous (keeping within a group) or exogamous (spreading across groups) depending on their purpose. For example, many religions and cults are endogamous meme complexes because they forbid or discourage conversion (as are most criminal organizations and secret societies). In fact, endogamous meme complexes are arguably more successful over the long term than exogamous meme complexes because they tend to bury deeply within a group, are highly difficult to displace, and are highly resistant to mutation.