All important architecture of the last century was strongly influenced by political systems. Look at the Soviet system, with its constructivism and Stalinism, Weimer with its Modern style, Mussolini and, of course, the Nazis and Albert Speer's colossal structures. Today's architecture is subservient to the market and its terms. The market has supplanted ideology. Architecture has turned into a spectacle. It has to package itself and no longer has significance as anything but a landmark.

There is no plateau of resting or stabilising. Once you are interested in how things evolve, you have a kind of never-ending perspective, because it means you are interested in articulating the evolution, and therefore the potential change, the potential redefinition.

We discovered a person in Lagos who had a fish stall, and within a single square metre she carried two children all the way to Harvard. She supported an unbelievable escape of her children into education. In that sense it was a city completed pixillated, and every pixel contained amazing stories.

What is now called "green architecture" is an opportunistic caricature of a much deeper consideration of the issues related to sustainability that architecture has been engaged with for many years. It was one of the first professions that was deeply concerned with these issues and that had an intellectual response to them.

The architecture per se isn't at fault. The more important factor, in my view, is the political neglect of these areas, which have essentially been cut off from other neighborhoods.

Why I talked about political correctness: the colonial is now such a major taboo that any achievement of the colonial period, or any generosity implied in colonialism, is again fundamentally neglected or fundamentally not recognised. That's crazy, because history is a series of layers, and you cannot say, "This layer I support and this layer I cancel." History is history and you cannot retrospectively manipulate it.

Lagos has also had a particular effect on my career. I was there early, and although it was a courageous step to go there and invest on this scale - I went there maybe 20 times - it's also been also super-controversial. There's an old school of thought that somebody like me has no place to go there.Because of colonialism and so on.