The Millennial generation is forging a distinctive path into adulthood. Now ranging in age from 18 to 331, they are relatively unattached to organized politics and religion, linked by social media, burdened by debt, distrustful of people, in no rush to marry--and optimistic about the future. They are also America's most racially diverse…

Social institutions that have been around for thousands of years generally change slowly, when they change at all. But that's not the way things have been playing out with marriage and family since the middle of the 20th Century. Some scholars argue that in the past five decades, the basic architecture of these age-old institutions has changed as…