Soviet war in Afghanistan
As Secretary of Defense, Weinberger oversaw a massive rebuilding of US military strength. Major defense programs he championed included the B-1B bomber and the "600-ship Navy". His efforts created economic and military-industrial pressures that were associated with the beginning of Perestroika and the beginning of the end of both the Cold War and the Soviet Union. However, this thesis was contested by a study on the causes of the collapse of the Soviet Union by two prominent economists from the World Bank – William Easterly, and Stanley Fischer from MIT: "...the study concludes that the increased Soviet defense spending provoked by Mr. Reagan's policies was not the straw that broke the back of the Evil Empire. The Soviet war in Afghanistan and the Soviet response to Mr. Reagan's Star Wars program caused only a relatively small rise in [USSR] defense costs. The massive US defense effort throughout the period from 1960 to 1987 contributed only marginally to Soviet economic decline."