It is known that initially the situationists wanted at the very least to build cities, the environment suitable to the unlimited deployment of new passions. But of course this was not easy and so we found ourselves forced to do much more. And during the entire course of events various partial projects had to be abandoned and a good number of our excellent capacities were not employed, as is the case—but how much more absolutely and sadly—for hundreds of millions of our contempo­raries.
Asger Jorn and Guy Debord, Le jardin d’Albisola
The sectors of a city are to some extent decipherable. But the personal meaning they have had for us is incommunicable, as is the secrecy of private life in general, regarding which we possess nothing but pitiful documents.
Guy Debord, Critique de la séparation
The city is the focal point of history because it embodies both a concentration of social power, which is what makes historical enterprises possible, and a consciousness of the past.
Guy Debord, La société du spectacle §176
Today cities themselves are presented as lamentable spectacles, a supplement to the museums for tourists driven around in glassed-in buses. 
Internationale situationniste #3

The new prefabricated cities clearly exemplify the totalitarian tendency of modern capitalism’s organization of life: the isolated inhabitants (generally isolated within the framework of the family cell) see their lives reduced to the pure triviality of repetition combined with the obligatory consumption of an equally repetitive spectacle.
Internationale situationniste #6
All cities are geological. You can’t take three steps without encountering ghosts bearing all the glamour of their legends.
Ivan Chtcheglov, Formulaire pour un urbanisme nouveau