Coming back to this two months later. Really disagree with the comparison after reading Walkaway. It was more Ayn Rand in style than Le Guin. The characters were mouth pieces for ideologies, the story was half baked at best, and a lot of the nuance is entirely lost to "but look, they're the bad guys and it went wrong for them!"

Not sure I'll try again. Thanks for the recommendation, but my search continues!