i as it relates to "the backbone of society": Our system of government (its three branches, the voting system, the judicial process, the bill of rights, how a bill becomes a law, etc.), organized religion and its rules (whether a Ti type believes them or not is irrelevant), military hierarchy (or governmental, religious, corporate, mafia, etc.), societal standards for "honor" (though certain aspects of "honor" could be attributed to other things, when someone talks about "honor" they're usually referring to some sort of code of behavior or position within a system), familial structure (not the relationships themselves... who likes or loves or hates who... but who is related to who and how, legally or technically speaking), corporate (or other holding entity and law) structure and law (including not for profit organizations), cultural laws/standards (arranged marriages, the first born son being the heir, etc.), international law and foreign policy (though obviously there are other factors as well), codes of ethics, systems of measurement (100 cm = 1 m... okay, now I'm getting closer to science again), political affiliation, associations (such as the PTA), family law, the department of health (or anything else, for that matter), etc.
Policy, laws, rules, systems, etc. These things are the backbone of society... the impartial/impersonal things that provide structure. Without such structure, things like property ownership and insurance would be nonexistent.