Unlike Games and Weapons, the theme isn’t as explicit, but Identity permeates everything in the story. I genuinely think it’s an unsung masterpiece. Excession, as much as people love it, is pretty much pure entertainment. Phlebas, Games and Weapons all leave you with stuff to think about afterwards.
Look to Windward is a great follow-up, emphasizing that you can have the smartest, best-intentioned, most powerful military ever and still fuck up when you try to use it to fix another civilization. The rage of the survivors of the Culture's intervention is quite justifiable, though the means of attempted retaliation isn't. From my brief description you might think that it was an allegory dashed off in response to the occupation of Afghanistan or Iraq, but the book was published in 2000. Banks was ahead of the curve.
In the end, Im a fan, Im glad that this happens, just a damn shame that Mr. Banks never got to see it.
If they do UOW