We are not having babies because we are selfish? Really? 

It is usually the other way around. Impoverished countries tend to have larger average family sizes due to the lack of affordable birth control and lack of a social safety net when parents get old (they rely on multi-generational households).

So, like most first world countries we have a negative population growth. Thank god. With the world's population expected to grow to nearly 14 billion in the next 20 years we are going to have a real challenge feeding everyone and avoiding large scale warfare over resources.

The UN expects population to level off at about 14 billion as more people are pulled out of poverty assuming globalization is not reversed by the recent political trends.