Was Reagan responsible for the Soviet Union's downfall?

"Long the leading Soviet expert on the United States, Georgi Arbatov, head of the Moscow-based Institute for the Study of the U.S.A. and Canada, wrote his memoirs in 1992. A Los Angeles Times book review by Robert Scheer summed up a portion of it:

Arbatov understood all too well the failings of Soviet totalitarianism in comparison to the economy and politics of the West. It is clear from this candid and nuanced memoir that the movement for change had been developing steadily inside the highest corridors of power ever since the death of Stalin. Arbatov not only provides considerable evidence for the controversial notion that this change would have come about without foreign pressure, he insists that the U.S. military buildup during the Reagan years actually impeded this development.

George F. Kennan agrees. The former U.S. ambassador to the Soviet Union, and father of the theory of "containment" of the same country, asserts that "the suggestion that any United States administration had the power to influence decisively the course of a tremendous domestic political upheaval in another great country on another side of the globe is simply childish." He contends that the extreme militarization of American policy strengthened hard-liners in the Soviet Union. "Thus the general effect of Cold War extremism was to delay rather than hasten the great change that overtook the Soviet Union." "