iGen: Why Today's Super-Connected Kids Are Growing Up Less Rebellious, More Tolerant, Less Happy--and Completely Unprepared for Adulthood--and What That Means for the Rest of Us

by Jean M. Twenge

Then it occurred to me: 2011–12 was exactly when the majority of Americans started to own cell phones that could access the Internet, popularly known as smartphones. The product of this sudden shift is iGen.