You Americans did so much, in the last century, to build an effective multilateral system, with the United Nations at its heart. Do you need it less today, and does it need you less, than 60 years ago?Surely not. More than ever today Americans, like the rest of humanity, need a functioning global system through which the world's peoples can face global challenges together. And in order to function, the system still cries out for far-sighted American leadership, in the Truman tradition.