Michael Mandelbaum is an American professor of international relations at Johns Hopkins University and a prominent foreign policy expert. He is known for his work on U.S. foreign policy, globalization, and international relations, and has authored several influential books, including "The Case for Goliath: How America Acts as the World's Government in the 21st Century." Mandelbaum has also served as a consultant for the U.S. government and various international organizations.