The first fundamental of successful city life: People must take a modicum of responsibility for each other even if they have no ties to each other. This is a lesson no one learns by being told. It is learned from the experience of having other people without ties of kinship or close friendship or formal responsibility to you take a modicum of responsibility for you.

Americans don't really think that other places are as real as America.

Virtually all ideologues, of any variety, are fearful and insecure, which is why they are drawn to ideologies that promise prefabricated answers for all circumstances.

There are two ways you encounter things in the world that are different. One is everything that comes in reinforces what you already believe and everything that you know. The other thing is that you stay flexible enough or curious enough and maybe unsure of yourself enough, or may be you are more sure of yourself - I don't know which it is - that the new things that come in keep reforming your world view.

In trading with each other cities can't be in too different stages of development, and they can't copy one another. Backward cities, or younger cities, or newly forming cities in supply regions, have to develop to a great extent on one another's shoulders. This is one of the terrible things about empires. Empires want them only to trade with the empire, which doesn't help them at all. It's just a way of exploiting them.

All my life I have been hearing that the oil was going to run out. It never happens. They keep discovering new oil fields. The world is apparently floating in oil fields.

I am ambivalent about London because I am so ambivalent about England in general.