I run a small organization in which only two of us are parents. The other 24 employees are childless; some are married, most are single and bouncing from one "relationship" to the next. When the topic of children comes up, as in; Are you planning on having any children? The answer is invariably Oh, God no!
So many feel they are independent, progressive, better-educated, etc. Of course one would be a complete idiot to commit to a relationship and have children. I'm too selfish, they say. One in particular, a very attractive woman of about 35 talks at length about her oh-so-traditional parents who have a very happy marriage. One can see the contempt and sarcasm she directs toward them. Is it really such a horrible thing to be happy?
I think it's already been said that too many Western women have given up. They aren't taught to be wives or companions, but rather Sex & The City trash. By age 35, most have had affairs with married men, had multiple sex partners, experimented with lesbianism, etc. Even in their 40s and 50s, they are still focused on luxury living and seeking out the next thrill. Marriage isn't worth the effort because all men are pigs; all men are the same, so if all men are pigs, you better become one if you expect to have sex in your lifetime.
No society on earth can continue with so many people living solitary and decadent lives. Of course, the end comes much more quickly when a population simply doesn't care - and virtue is the highest vice. It's a shame really.