Every country faces generational change. Evolutions in technology, culture, social mores and global affairs can leave a gulf between young and old that neither can easily bridge. In Russia, that gulf is especially vast. As of this year, 27 percent of Russians were born after the fall of the Soviet Union, and that number will jump to nearly 40 percent within the next decade. The rising generation was never Sovietized. Most of them, moreover, are too young to remember the tumultuous 1990s, a decade of war, financial crisis and political disarray. Unlike the older generations, they don't recall Russian President Vladimir Putin's promises to save Russia or the measures he took to stabilize the country after its post-Soviet tailspin. In fact, they've never really known life without him. For Putin, the situation poses an unfamiliar challenge....