The Just City: Spoilers, Arguments, and Speculations

It's all but a tradition here on Making Light now: shortly after the launch of a Jo Walton book, we're in need of a spoiler thread. But for this one in particular, I think we need more than that. As both Liz Bourke and Amal El-Mohtar point out, The Just City is not only a fascinating book, but a set of arguments that invite arguing back. And judging by my Twitter stream, its premise is also a rich source of speculation.

So here's a thread where you can indulge in all of these things with people who have either read the book, or don't mind spoilers.