The alarming lack of ideas that is recognizable in all acts of culture, politics, organization of life, and the rest is explained by this, and the weakness of the modernist constructers of functionalist cities is only a particularly visible example of it. Intelligent specialists only ever have the intelligence to play the game of specialists: hence the fearful conformity and fundamental lack of imagination that make them admit that this or that product is useful, good, necessary. In fact, the root of the reigning lack of imagination cannot be understood if one does not have access to the imagination of lack--that is to conceiving what is absent, forbidden, and hidden, and yet possible, in modern life.
Tom McDonough, The Situationists and the City: A Reader
206, city, imagination, situationist