I spent most of my career doing high-energy physics, quarks, dark matter, string theory and so on.

If you ask people why they move to the city, they always give the same reasons. They've come to get a job or follow their friends or to be at the center of a scene. That's why we pay the high rent. Cities are all about the people, not the infrastructure.

Everything around us is scale dependent. It's woven into the fabric of the universe.

My provocative statement is that we desperately need a serious, scientific theory of cities and scientific theory means quantifiable, relying on underlying generic principles that can be made in a - put into a predictive framework. That's the quest.

One-sided national economic triumphs cannot be achieved in the increasingly interwoven global economy without precipitating calamitous consequences for everyone.

There is no class so pitiably wretched as that which possesses money and nothing else.

We can't let people down when they can't get any medical care, when they're sick and don't have money to go to a doctor. You help them.

You don't need money to be free. You can just say if you don't need stuff, you're always free.