Generations: The Real Differences Between Gen Z, Millennials, Gen X, Boomers, and Silents—and What They Mean for America's Future

by Jean M. Twenge

it’s pretty stunning that 1 out of 3 women in a so-called slacker generation born in the zero-population-growth 1970s has three or more kids. Raised in a time when kids were out of style, Gen X brought them back in.