How did Russia change over time?

WHEN the Second World War was drawing to a close hopes ran high that the Soviet Union had undergone fundamental changes. Britain, and even more the United States, persuaded themselves that Russia had abandoned the aim of world revolution and had reverted to the traditional anxieties of a great power determined to safeguard its own security, and that a real basis existed for a permanent accommodation between the Soviet and the Western powers. This delusion was fostered by the unexpectedly superb military endurance and prowess of the Russian soldier, by the upsurge of patriotic and national, and the decline of ideological, …

Explanation:

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china and usa

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d) a constitutional amendment