Dans,

We are not talking about the rest of the world we are talking about the US.
Thats like saying let the Steelhead die out there are plenty of fish in the world. It's a valid biological point even if you do not think so. BTW US birth rates are not keeping pace with the rest of the world which has dire economic consequences for your kids and grandkids. So you should be concerned about it even if you think it's a non issue.