The Wander(ing) Years

"They see that people in this age bracket are delaying marriage. They’re delaying having children. They’re delaying permanent employment. People who were born before 1964 tend to define adulthood by certain accomplishments—moving away from home, becoming financially independent, getting married and starting a family.
"In 1960, roughly 70 percent of 30-year-olds had achieved these things. By 2000, fewer than 40 percent of 30-year-olds had done the same."

David Brooks in The New York Times argues that a new stage in life has emerged.