[applause] now it is my pleasure to introduce kwame anthony appiah. he is approached with the rarest combination of break-through, africa and an afghan american intellectual history and political philosophy. poppy is a thinker and a writer. uses our brain 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, "the honor code," how moral revolutions happen. .. >> in our globalize interconnected and connected world. three smart and entertaining mystery novels, the discipline crossing and first and last deeply invested in human-rights and individual liberty. but the concerns of the question looking at successful campaigns of practices now considered