Thanks for this - it'll take me awhile to work through it, especially because I'm already bouncing off it (questioning existing systems is usually like that, though the sheer scope of things they're reevaluating before providing solutions is a little overwhelming). I'll get it eventually; it's something I've been on the lookout for.
In the small bit of solarpunk fiction I've read and discussions I've seen, I've felt a bit like the genre/community sort of sidesteps questions around the use and preventions of violence and how to handle individuals and groups who want to cause harm (with the exception of Walkaway, and Terraformers for opposing organizations). I know the underlying philosophies and movements like anarchism have been around for a long time so I figured they had answers, but haven't dug into them yet.
I suppose I'm pessimistic enough to see bad times ahead - scarcity of airable land, water, and society-derived stuff like medicines - and to expect that any more solarpunk societies would only build themselves up in space made mostly after our current systems break enough not to oppose them. With that kind of postapocalyptic bent in mind, it's tempting to picture something like the old west or early colonial societies' answers to these questions. I'm interested to see the alternatives.