Johnson warned that the collapse of the Soviet Union in the wake of the war in Afghanistan should have been a warning to Washington. Even more ominously, at a moment when this country’s foreign-policy establishment considered us the “indispensable nation” (Secretary of State Madeleine Albright’s phrase), he suggested that we were already experiencing “imperial overextension” and on the long downward slope that all empires experience sooner or later.
Source: Blowback for the Twenty-First Century: Remembering Chalmers Johnson – CounterPunch.org