Alexander III, the conservative Russian emperor who ruled from 1881 to 1894, once famously remarked to his ministers that Russia has only two allies: its army and its navy. "The others," he said, "will go against us at the first opportunity."
Russian President Vladimir Putin recalled these words in a 2015 speech, adding that he quite agreed with them. At the time, Putin held every card he needed to point to the West and proclaim that the world stood against Russia, leaving it with only its forces for protection. But as the incoming administration of U.S. President-elect Donald Trump moves to embrace Russia and question the West's assumptions about NATO -- just as the Europeans have begun to look for warmer ties to the east -- Russia's diplomatic environment has started to change. And one thing Putin certainly understands, as Alexander III did, is the Russian government's need for an external...