One for the philosophers, maybe.
An online community in which I participate is currently engaged in a pseudo-periodic paroxysm over feminism as it relates to changing one’s name at marriage or vice versa. I’m generally in favor of feminism and have a vague sense that the idea of “choice feminism” is vacuous inasmuch as it amounts to sanctifying acts based on the genitals of the actor—but there’s much I don’t know about the history of feminism, to say nothing of the history of marriage, changing one’s name thereat, naming in general, and all sorts of things that seem keenly relevant to the astonishing variety in the ways that contemporary (liberal, overeducated) Americans choose to name themselves and their offspring throughout their lives. So I don’t especially want to engage.
In thinking about whether or not to engage, though, I arrived at a way to classify ideologies that may or may not be interesting. The question that arose in my mind was, “Is it feminist to insist that others be feminist?” Internet caricatures of feminational socialism notwithstanding, I think the answer is at least plausibly “no.” It depends on which others, of course, but part of the very impetus for feminism is the fact that lots of women are very badly oppressed and suffer sanctions when they stand up for themselves. Insisting that women court death or maiming in exchange for a negligible effect on such a culture doesn’t seem like a pro-woman thing to do. (The same might apply to men in such cultures as well, but doing something disadvantageous to men is less obviously non-feminist.)
Anyway, it seems strange for an ideology to have such a property, and you could try to view it as a defect. But I’m not sure it is—or if it is, I think it’s widespread. Generalize the question to “Is it X to insist that others be X?” If X is “Christian,” I probably know more Christians who would answer “no” than “yes” (obviously some would answer “yes”). If X is “left-wing” as Americans understand it, I think the answer is almost certainly no—or, at least, the American left tries to make a good show of tolerating some cultures with values that don’t sit well with their (our?) own. Presumably the answer is “no” for any non-evangelical religion; it’s interesting to wonder whether it’s true for “tolerant” or “open-minded.” As for “agnostic,” well, hard to know.
On the flip side, there are ideologies for which this is straightforwardly true. “Fascist” would be the most obvious one, and you could spend a while playing a left/right split here, but I think it’s not quite so clear. “Environmentalist” seems to be a big yes, for example; likewise “vegetarian” and “vegan,” although those bump a bit because they read more as practices than ideologies. “Libertarian” is a minor minefield—it seems like the answer ought to be “no,” but libertarians do in fact proudly insist on less government for everybody, which, when you phrase it that way, magically transmutes it from individualism to paternalism (“If you just *understood* how much better off you’d be with less government, you’d vote for me”).
There’s obviously a bit of wiggle room here. A lot turns on the word “insist” and the unquantified word “others”; changing those would change a lot of answers. But I don’t think I’ve construed them in ridiculous ways above.
In any case, once you’ve got such a classification system, the question is what it’s good for. I suppose the obvious prediction it makes is about memetics: “no” ideologies should be at an evolutionary disadvantage relative to “yes” ideologies, because “yes” ideologies carry a stronger urge to self-replicate. But is this really true? It’s hard to tell in part because it’s hard to make a minimal contrast between “yes” and “no” ideologies; going back to the ur-example, you can perhaps imagine feminisms with different answers, but they’d be different in ways other than the answers, perhaps most notably in that they appeal differently to the self-interest of different groups of women. Putting that aside, though, it doesn’t seem clear that “no” ideologies are all that unsuccessful. Buddhism seems like the paradigm “no” ideology, and it is huge and ancient (acknowledged: there are many Buddhisms, perhaps some are evangelical, I’m not an expert). Fascism is, as I half-joked above, the paradigm “yes” ideology, and it has enjoyed terrifying epochs of dominance—but has it ever been as popular as Buddhism?
I don’t have a great coda here, except maybe this: The urge to self-replicate might not always be the dominant consideration in the success of *any* kind of replicator, memetic or otherwise. This seems like a proof of concept, at least, that there can be other ways to take a firm grip within a population characterized by ceaseless and ruthless competition.