poverty has no causes. Only prosperity has causes. Analogically, heat is a result of active processes; it has causes. But cold is not the result of any processes; it is only the absence of heat. Just so, the great cold of poverty and economic stagnation is merely the absence of economic development.

New ideas must use old buildings

This is something everyone knows: A well-used city street is apt to be a safe street. A deserted city street is apt to be unsafe.

...frequent streets and short blocks are valuable because of the fabric of intricate cross-use that they permit among the users of a city neighbouhood.

I still have a lot of family in America. I still have a lot of friends there. There is a lot that I admire there very much. When I find America getting too much criticized outside America, I want to tell them how many things are good about it.

Empires want [cities] only to trade with the empire, which doesn't help them at all. It's just a way of exploiting them.

Designing a dream city is easy; rebuilding a living one takes imagination.