Move over, millennials—not everything is about you anymore. Generation Z is beginning to come of age, and they’d rather get stuff done than talk about how it feels. Case in point: Jonah Stillman. The Minnetonka High School junior is already emerging as the voice of his generation (born 1995–2012)—hitting the corporate speaking circuit and showing up at presidential primaries to talk to national media about the issues important to young people. Where does a 16-year-old get that drive? Why, from his Gen X father, David Stillman (47), an expert on generations and co-author of two best-selling books on the subject. “I grew up watching my dad be the voice of his generation, and I started seeing the gaps,” Jonah says. “There’s millennial fatigue, and people are confusing my generation with millennials. We’re competitive. We’re willing to try things and fail. Our parents didn’t give us constant praise.” Together, Jonah and David founded GenZGuru (genzguru.com) and piloted one of the first national studies on Gen Z’s attitudes toward the workplace. A book is on the way later this year. Until then, the Stillmans shed light on some key cultural differences between millennials and Gen Z, as we brace ourselves for the next batch of babysitters, interns, and—gulp—bosses.