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

graders who believe they are above average in intelligence and school ability. Monitoring the Future, 1976–2015.

Median age at first marriage for men and women. Current Population Survey, 1960–2015.

Percentage of 8th and 10th graders who get the news once a week or more, averaged across radio, TV, newspapers, magazines, and (in 2004 and later) the Internet, 1991–2015.