It has nothing to do with "maturity" and everything to do with just hierarchy in general. There is something to the old XKCD joke: https://xkcd.com/435/ https:/

It has nothing to do with "maturity" and everything to do with just hierarchy in general. There is something to the old XKCD joke: https://xkcd.com/435/ https://xkcd.com/435/ because the disciplines really are divided like that. You have to know physics to do chemistry well. You have to know chemistry to do biology well. You have to know biology to ... etc. Whereas to do physics well you need only mathematics. Well, at least, to do the theories well. To actually execute the experiments is, ah, more challenging. So I would argue the Standard Model is pretty much the only thing in all of human knowledge that depends on no other physical theories. It's the bottom. Shame it's pretty useless (intractable) as soon as you have three or more particles to calculate with, though....