The ‘European project’, in so far as it ever existed outside the heads of a few idealists, had stalled by the mid-nineteen-fifties. The French Nation… - Tony Judt

Gorbachev did more than just let the colonies go. By indicating that he would not intervene he decisively undermined the only real source of political legitimacy available to the rulers of the satellite states: the promise (or threat) of military intervention from Moscow. Without that threat the local regimes were politically naked. Economically they might have struggled for a few more years, but there, too, the logic of Soviet retreat was implacable: once Moscow started charging world market prices for its exports to Comecon countries (as it did in 1990) the latter, heavily dependent on imperial subsidies, would have collapsed in any event.
As this last example suggests, Gorbachev was letting Communism fall in eastern Europe in order to save it in Russia itself—just as Stalin had built the satellite regimes not for their own sake but as a security for his western frontier. Tactically Gorbachev miscalculated badly—within two years the lessons of Eastern Europe would be used against the region’s liberator on his home territory. But strategically his achievement was immense and unprecedented. No other territorial empire in recorded history ever abandoned its dominions so rapidly, with such good grace and so little bloodshed. Gorbachev cannot take direct credit for what happened in 1989—he did not plan it and only hazily grasped its long-term import. But he was the permissive and precipitating cause. It was Mr Gorbachev’s revolution.

From the end of World War I until the middle of the middle of the 1970s, French public life was shaped and misshaped by three overlapping and intersecting forms of collective and individual irresponsibility. The first of these was political. Reading the history of interwar France, one is struck again and again by the incompetence, the insouciance and the culpable negligence of the men who governed the country and represented its citizens. This is not a political observation, in the partisan sense, but rather a cultural one.

This paradox—that a peaceful European settlement was taking shape even as the two Great Powers of the day were arming themselves to the hilt and preparing for the eventuality of a thermonuclear war—was not so bizarre as it might appear. The growing emphasis in US and Soviet strategic thinking on nuclear weapons, and the intercontinental missiles with which to deliver them, released European states from the need to compete in an arena where they could not hope to match the resources of the superpowers, even though central Europe remained the most likely terrain over which any future war might be fought. For this reason, the Cold War in Western Europe was experienced quite differently in these years from the way it was felt in the United States, or indeed in the USSR.