On January 14, Vladimir Putin ordered Russia’s natural gas monopoly, Gazprom, to cut back by 60% the natural gas delivered to Europe through Ukraine. His ostensible reason: Ukraine was illegally siphoning off gas for its own use—a charge Ukraine denies. Overall Europe depends on Russia for 30% of its gas supplies, and some 80% of Europe’s Russian natural gas comes via Ukraine. Putin’s order would leave six countries in eastern and southeastern Europe totally without gas.