(By W. Bradford Wilcox, professor of sociology) The portrait painted of Millennial Americans by the Pew Research Center in its new report Millennials in Adulthood is not rosy. Sure, compared with earlier generations, Millennials (now aged 18 to 33) are exceptionally tolerant, optimistic about their economic future, and connected to friends, family, and colleagues on the "new platforms of the digital era" - from Facebook to Twitter. But this report makes clear that Millennial ties to the core human institutions that have sustained the American experiment - work, marriage, and civil so...