Three decades after the fall of the Berlin Wall, the West is yet again engaged in an increasingly tense confrontation with the Kremlin. One point of friction, central to the Kremlin’s narrative of grievance, has been NATO’s role as a guarantor of security and stability in Europe and the sovereignty of its member states. Moscow’s leaders, in seeking to undercut and eliminate that role, argue that their country has been a victim of an expansionist Western strategy to isolate and weaken Russia.

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