There's a World Government actually, above all the kingdoms, and republics, and everything else that belongs to it. There are a few independent nations... but it's hard for them to survive.

[He knows exactly why that is and just how much the World Government has a hand in that.]

As for the seas, well it's their rule directly, and their navies enforce it. Big seas, but they do their best to keep things under their control.

[Why does that sound like it was implied it isn't a good thing. Because it isn't.]