The Parent Trap -- Opinion Journal
Wednesday's Opinion Journal included an excellent piece by Glenn Harlan Reynolds describing how legal and societal attitudes have made parenting increasingly discouraging and discouraged.
It makes a similar point (though better written) as this blog's Why I'm OK with same-sex marriage. Specifically, that parents perform a function different from and more necessary to society than childless couples. There's little sense improving the prospects of our posterity if there isn't a posterity to improve for.