We can't literally talk with everybody else on the planet or even with representatives of every group. But we can be in favor of the respectful exchange of ideas in ways that don't presuppose that all the right answers are on our own side. Still, we should all have moral bottom lines. Once genocide or torture begins the priority shifts from understanding to stopping it. One hope I have for the global conversation as instantiated in human rights treaties is that we are slowly coming to consensus on certain moral baselines.

The challenge, then, is to take minds and hearts formed over the long millennia of living in local troops and equip them with ideas and institutions that will allow us to live together as the global tribe we have become.

I favor a form of cosmopolitanism that takes nations very seriously, particularly because of the role of national law in sustaining or, unfortunately, undermining human rights. Some cosmopolitans take the metaphor of global citizenship - the etymology of the word, after all, just comes from a Greek phrase meaning citizen of the world - to rule out taking national citizenship seriously. I think that's a big mistake. Why can't I be loyal to America and to humanity? After all, I can be loyal to America and to New York city!

There are many people of cosmopolitan temperament who are not from the elites of their societies or the world; and while, for a variety of reasons, I think a cosmopolitan spirit does naturally go with city life, that's the life of a very large proportion of human beings today. And I don't think rural people can't be cosmopolitan, in my sense.

Conversation doesn’t have to lead to consensus about anything especially not values; it’s enough that it helps people get used to one another

Unless you have the power to stop the government of Iran beheading teenagers for homosexual acts, there's not much to be done except deplore it unless you are willing to converse with people about why they thinking this is okay.

Conversations...begin with the sort of imaginative engagement you get when you read a novel or watch a movie or attend to a work of art that speaks from some place other than your own. So I'm using the word 'conversation' not only for literal talk but also as a metaphor for engagement with the experience and ideas of others. And I stress the role of the imagination here because the encounters, properly conducted, are valuable in themselves. Conversation doesn't have to lead to consensus about anything, especially not values; it's enough that it helps people get used to one another.