This book’s conclusions about generational differences are based on twenty-four datasets, some of which go back to the 1940s. They assess children, adolescents, and adults and include a staggering total of 39 million people (see Figure 1.6), considerably more than the combined population of the ten largest cities in the U.S. This is a significant upgrade from my previous book, iGen, which relied on four datasets including approximately 11 million people. These datasets allow us to hear each generation’s story through the voices of its members. That fulfills the primary goal of this book: To
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