Millennials, Baby Boomers, Gen Z—we like to define people by when they were born, but an acclaimed social researcher explains why we shouldn't.

Boomers are narcissists. Millennials are spoiled. Gen Zers are lazy. We assume people born around the same time have basically the same values. It makes for good headlines, but is it true?

Bobby Duffy has spent years studying generational distinctions. In The Generation Myth, he argues that our generational identities are not fixed but fluid, reforming throughout our lives. Based on an analysis of what over three million people really think about homeownership, sex, well-being, and more, Duffy offers a new model for understanding how generations form, how they shape societies, and why generational differences aren’t as sharp as we think.

The Generation Myth is a vital rejoinder to alarmist worries about generational warfare and social decline. The kids are all right, it turns out. Their parents are too.