[applause] it's my pleasure to introduce kwame anthony appiah. the philosophy of mind and language, african and african-american intellectual history and political philosophy. appiah as a thinker and a writer is as urbane and as warm, as reflective and as accessible, as challenging and as generous as he is as a friend. a premier scholar of contemporary philosophical thought, his work crosses disciplines as it crosses national boundaries and celebrates human rights, ethnic and cultural pluralism, individual identity, intellectual liberty and a sublime mode of cosmopolitanism. let me review just a few of appiah's earlier accomplishments before talking for a moment about his new book with, "the honor code: how moral revolutions happen." educated in ghana and england where we met some 37 years ago at claire college, appiah quickly rose to prominence as a philosopher at the intersection of the philosophy of language and the philosophy of mind. he is now the lawrence s. rockefeller university professor of of philosophy and the university center for huma