It's a fundamental shift in the way we live our lives that has implications for everything from what we believe to how long we live.
By the numbers: Average time spent socializing per day has fallen from 45 to 35 minutes over the last 20 years.
<ul><li>The decline is steepest among young people: 15- to 24-year-olds went from spen… [+1316 chars]
<ul><li>The decline is steepest among young people: 15- to 24-year-olds went from spen… [+1316 chars]