Consider Phlebas (Culture, #1)

by Iain M. Banks

The Culture, there could be no doubt, relied profoundly on its machines for both its strategy and tactics in the war it was now engaged in. Indeed, a case could be made for holding that the Culture was its machines, that they represented it at a more fundamental level than did any single human or group of humans within the society. The Minds that the Culture’s factory craft, safe Orbitals and larger GSVs were now producing were some of the most sophisticated collections of matter in the galaxy. They were so intelligent that no human was capable of understanding just how smart they were (and the machines themselves were incapable of describing it to such a limited form of life). From those mental colossi, down through the more ordinary but still sentient machines and the smart but ultimately mechanistic and predictable computers, right down to the smallest circuit in a micromissile hardly more intelligent than a fly, the Culture had placed its bets—long before the Idiran war had been envisaged—on the machine rather than the human brain. This was because the Culture saw itself as being a self-consciously rational society; and machines, even sentient ones, were more capable of achieving this desired state as well as more efficient at using it once they had. That was good enough for the Culture. Besides, it left the humans in the Culture free to take care of the things that really mattered in life, such as sports, games, romance, studying dead languages, barbarian societies an...