Marriage in decline?

My father-in-law sent me this editorial from the Salt Lake Tribune entitled "Marriage faces inevitable decline in face of 'me' generation". It's a fairly interesting piece - a little too extreme relative to my own position on some of these topics but still thought-provoking. I was a little surprised that married couples are the minority in America today. Certainly more and more people are waiting in life to both get married and have kids - and having less kids than in the past. From a sustainability perspective, having less kids (or no kids) is potentially a good thing. It puts less pressure on the Earth's resources and our environment. On the other hand, it places a greater economic burden on the newer generation since there are less of them to support the ever-growing needs of older, longer-living generations at-or-near retirement.

Here's an interesting question. Is it better to have lots of people rush into marriage but have a 50% divorce rate? Or is it better for people to wait, potentially have sex outside of marriage, and get married once they're ready (if ever)? No easy answers here.