<p>About one-third of the total adult population — some 77 million Americans aged 20 and over — are unmarried. Forty-seven million of them (26 million men and 21 million women) have never married.</p>
<p>Culture-trend watcher Barbara Dafoe Whitehead, best known for her April 1993 "Dan Quayle Was Right" article in the Atlantic Monthly on behalf of two-parent families, says women have to work harder.</p>