Russia’s future will be characterized by a smaller population. Russian President Vladimir Putin’s war has virtually guaranteed that for generations to come, Russia’s population will be not only smaller, but also older, more fragile, and less well-educated. It will almost certainly be ethnically less Russian and more religiously diverse. While some might view diversity as a strength, many Russians do not see it this way. In a world with hordes of people on the move to escape war, persecution, poverty, and the increasing impact of climate change, xenophobic political rhetoric sells well. Putin has spoken frequently about Russia’s demographic problems,...