"The Soviet communist leadership may have magnified the prospects of 'European revolution' but it did not invent them out of nothing. Country after country to the west of Russia was experiencing disorder and discontent. Russia itself emerged under Bolshevik rule from years of civil war and foreign armed intervention. The victor powers in the Great War had irresistible force at their disposal if only they could muster the will to deploy it. But they increasingly lacked that will. The Western Allies had not had properly agreed strategic aims since at least 1917, when America joined them."