Contributor(s): Professor Michael Cox, Jessica Mathews, Bob Singh | The 2008 race for the White House has been the most exciting in recent American history. But will it make much difference to the United States and the rest of the world who wins: Obama or McCain? Michael Cox is a professor of international relations at LSE. Jessica Mathews is president of the Carnegie Endowment for International Peace. Rob Singh is a fellow of the RSA and an associate fellow of the Institute for the Study of the Americas.