The Kremlin faces no shortage of problems, but one of its biggest comes in a rather unlikely form: teenagers. A wave of protests swept across more than 82 cities in Russia in March, driven in large part by the country's youngest political activists. Pictures of teens climbing street lamps, speaking to crowds and being arrested by bulky policemen flooded the internet, causing many Russian media outlets to publicly wonder whether the burgeoning movement was the most youthful the nation had ever seen. Generation Z, an as yet unknown and unstudied segment of Russian society, had entered the political scene as a group of fully formed and politically conscious individuals....