His courses on international politics and history are among the most popular at the University. A centerpiece of his work is the University's Program on International Politics, Economics, and Security (PIPES), which Dr. Lipson co-founded and co-directs. Dr. Lipson received his undergraduate degree from Yale in political science and economics and his Master's and Ph.D. from Harvard in political science. His latest book on international affairs deals with war, peace, and democracy. Entitled Reliable Partners: How Democracies Have Made a Separate Peace, it was published by Princeton University Press (2003).