I don't think I hold purely to any given philosophy (or maybe I do and I just don't know its name
), but I think I'm close to utilitarianism. A phrase I first heard from Sam Harris is "the well being of conscious creatures". Which I take to mean "the well being of conscious creatures for as many generations as possible" (WBMG). My claim is that most philosophies need at least one axiom, and WBMG is the one I take. In other words, if you were to argue that I cannot defend WBMG as being truth-apt, I would have to agree. For me WBMG is axiomatic, unprovable.
So I guess it boils down to this: In your OP, can you allow for axiom(s) or not?