I second the "go back to fundamentals" bit.
And about international law in specific, I read an interesting account of it's history in Henry Sumner Maine's "Ancient Law", where he describes the transition between various conceptions of international law, one where the primary entities were tribes/people and not territory, then one where everything is under a centralized sovereignty that is supposed to solve all conflicts (the roman empire, then the pope - I guess the same would apply to China); and then finally what we have now, a territory-based distinction (I'm summarizing a lot, and probably got some bits wrong).
In the same category as Grotius, you might want to check out Montesquieu, whose ideas strongly influenced the American Constitution.
I've become adept at navigating the bureaucracy of my public high school. I've dropped environmental science as an AP (because it was painfully slow and replete with busywork) and am now taking an "independent study" in government. I'm going to be using this mainly as a way to study environmental science at my own pace, but I also have to read and write some about standard political issues. the requirements of the independent study are pretty vague. In order to get approved, I've got to BS some reason why I should be granted an independent study. I'm obviously not going to speak plainly. I'll probably say something about my interests in seasteading, environmentalism, and education reform. What books do you recommend on the politics of these subjects given that it is the mindkiller? Also, the main focus is on environmentalism, not on education or seasteading. I've done a bit of research regarding seasteading, but there's not much that I know about
I was particularly interested in this point brought up in the seasteading book:
They also recommend a reading list:
In regards to environmentalism, I was thinking about focusing on the relationships between government funding for green businesses as green entrepreneurship is of interest to me. I'd probably have to talk about the Solyndra scandal at some point.
As a side note, if the requirements aren't too stringent and I can just write about whatever I feel like so long as it vaguely relates to politics (like in my independent study in psychology), I may just go meta and write about Americans Elect.
Edit: I do think that there is a difference between descriptive politics ( e.g.describing the workings of the EPA or a standard civics class) and and normative (woo liberatarians!). I'm more interested in descriptive politics.