Agreements among nations. Strong institutions. Support for human rights. Investments in development. All these are vital ingredients in bringing about the evolution that President Kennedy spoke about. And yet, I do not believe that we will have the will, the determination, the staying power, to complete this work without something more — and that's the continued expansion of our moral imagination; an insistence that there's something irreducible that we all share.

Nobel Prize acceptance speech (December 2009)