U.S. allies must be held responsible for defending themselves and the global commons. During the Cold War, defending the free world from communist conquest and domination while they rebuilt their economies was necessary and proper. As those countries prospered, however, the justification for American protection waned. The Cold War’s end further eroded the foundations of perpetual alliances backed by foreign-deployed U.S. troops. Other advanced nations should share America’s global burdens instead of free-riding on us.