Vladimir Putin’s invasion of Ukraine was precipitated by assurances from China, Germany, and the United States that each of Russia’s major trading partners either backed his position or had zero interest in getting in his way. President Joe Biden’s invitations to Putin to bite off more chunks of Ukraine made it clear that America was not interested in a fight with the Russian dictator in his own backyard. Surely, the mighty Putin would make quick work of the Ukrainians. After all, he helped put down the Syrian rebellion to preserve Iran’s stake in Syria, and thereby sealed Barack Obama’s nuclear...