Professor Appiah talked about his book Cosmopolitanism: Ethics in a World of Strangers, published by W.W. Norton. He explained that “cosmopolitanism” is a philosophy derived from Greek cynics that played a major part in the shaping of the Enlightenment, the French Revolution and the United Nation’s Universal Declaration of Human Rights. He argued that the power of one is stronger than the power of difference and urged Western leaders to adopt this cultural method for the sake of humanity. He answered audience members' questions.