My fault, as usual, since your list is what people usually mean by reffing an "ism". Instead of a system of thought, I meant a prejudice.
For example, "sexism" groups people by gender and assumes characteristics on that basis. This is pretty useful sometimes - so useful we don't even call it sexism (for example, it's not considered sexist to filter by gender before obtaining one's sexual partners). Racism, one might think reflects tribal divisions. If one followed that mindset, one would class sexism above racism on my list (since tribal characteristics change more rapidly than sexual characteristics). As systems of thought, your isms provide a struture to most things, my isms included ('ism' after here, meaning of my type). A Marxist, for example, (I don't recall if that was specifically on your list, but along yourl line of thinking). might see almost everything as subordinate to classisms and so class would be the slowest changing of isms (because any ism which doesn't change keeps that piece of classism unchanged). A Fascist might would make nationalism fundamental, perhaps (national-ism, an ism of my sort too). I would say Nazis conflast race and state, which combines to form their fundamental ism (of my sort), with everything else subordinate (except, perhaps, gender, running in parallel).
