Skimming through the internet, I came across an interesing article by Phillip Longman about what declining birth rates and abortion is doing to a society.  But I think that has been hashed over before enough and was not really worthy of an article.  However, there was one quote that when I read it, I had to laugh and say "Yes".  For it applies not necessarily to America, but to Europe and their current and future problems:

At that point, instead of dying of starvation, societies with high fertility grew in strength and number and began menacing those with lower fertility. In more and more places in the world, fast-breeding tribes morphed into nations and empires and swept away any remaining, slow-breeding hunters and gatherers. It mattered that your warriors were fierce and valiant in battle; it mattered more that there were lots of them.

That last line is excellent, and he points to the fall of the Greek City states at the hands of the romans as a prime example.

And I found it amusing as well.