Iain M. Banks is the author of dark and richly written SF novels. As Iain Banks he also writes mainstream fiction. While not exactly light reading he has a streak of humor that reminds me a bit of Jack Vance. Kilometer long heavily armed starships are controlled by whimsical artificial intelligences that give themselves names like: No More Mr Nice Guy, So Much For Subtlety, What Are The Civilian Applications, Frank Exchange Of Views, Ultimate Ship The Second, Poke It With A Stick and I Blame The Parents. The design of spacesuits and other appliances is constrained by the consideration that giving a device too much sentience will qualify it for civil rights.
Several of his works are set in a universe that contains the Culture, a wealthy, technologically advanced society of sexually permissive hedonists. From time to time the Culture comes into conflict with other poorer and less advanced societies: theocratic, autocratic, and/or sexist. These tend to see the Culture as soulless, corrupt, decadent and morally impure.
To their dismay, they discover that the smug Culture has a set of moral values that take a dim view of perceived threats to the Culture, not to mention a dim view of theocracy, autocracy and sexism. The easygoing hedonists maintain a group of hardened professionals to deal with Special Circumstances of this sort, and will descend on your neighborhood with whatever mixture of hardened professionals, drones, missiles, enormous warships, technological superiority and firepower is deemed necessary to result in a satisfactory regime change.
Banks has described the Culture as "exactly the place I would like to live. I can't imagine a better place- it's a utopian society"
I hope the similarities between the United States post 9/11 and the Culture are clear enough that I don't have to beat you over the head with them. Likewise the similarities between the Culture's adversaries and the people the US was changing the regime of during the same period.
Ironically, the Culture novels published so far were all written before 9/11/2001. And Banks has been a vigorous critic of the conduct of the US government since then.