 Listen, people's life chances are very, very much dependent upon the zip code where you happen to be born. It's as simple as that. And if life chances are structured that way, so that if you live in a certain zip code, you end up being wealthy, and if you end up in another zip code, you end up being poor, then you kind of say, well, there's something wrong with this, we've got to change the qualities of all those zip codes so that we get greater equality, but also greater levels of choice so that people can freely choose where they live in the city and how they live in the city and choose what kind of people they want to be or what kind of people they want to be with. The question of what kind of city we want to build can't be separated from the question of what kind of people do we want to be.