Philosophy, and, in a similar vein, Political Theory. Both have the same problem in regards to self-education:
Where do you even start? There's obviously a directional flow, temporally, but where's the line? Should I be starting with dang papyrus tomes? Or are there, like, more well-known starting points?
Or do you just pick something that's interesting, jump in, and kinda choose a direction after that? 'Oh, I started with Foucault, but then I went Heidegger, Heigel, Kant', 'Huh! I went chronological, Kant to Foucault.'
Is there a philosophy speedrun flowchart? Or am I just asking the questions that are answered by a university degree in philosophy?
Basically, same questions for political theory.