Men not marrying? How deep does "the problem" go?

Is it just the risks of Marriage 2.0 preventing men from rushing to the altar? Is it merely a function of the women available to the average man? Is it the divorce rate? The spectre of lifetime alimony and every-other-weekend-dad status? Or is it a deeper problem than even that? http://www.nationalreview.com/home-fr... http://heartiste.wordpress.com/2012/0... http://www.genderratic.com/?p=1140