As the world has born witness over the past week, Vladimir Putin, the President of Russia, is waging a war of choice, an unprovoked war of aggression against its much smaller and not nearly as well-armed neighbor—the sovereign nation of Ukraine—and, in the process, has committed and is continuing to commit war crimes against the Ukrainian people. As the mounting evidence makes clear, Putin is—and for a long time now has been—a war criminal. The International Criminal Court (ICC), which has already begun an investigation of Putin's dirty war, should charge him as such as soon as possible, and he can and should be held to answer for his crimes.