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This struggle, known as the Cold War, lasted from about 1947 to 1991, beginning with the second Red Scare and ending with the Dissolution of the Soviet Union. Prominent Historian of the Cold War, John Lewis Gaddis, wrote at the dawn of the post-Cold War era that the characteristics of the new era are not yet certain but it is certain that it will be very different from the Cold War era and it means that a turning point of world-historical significance took place:

1947 to 1991