Here's something to think about. The areas in the world that tend to be least effected by technological advances, have the least access to prime medical care, etc, are the places where the population is rising fastest. Where, in places like America and Europe, except for immigration we aren't reproducing fast enough to sustain our population.

Now zoom in a bit on any given area of the U.S. Who are having the most kids? Is it the well educated, successful executive/professional/academic types? No, its the low-functioning people at the bottom of the scale. Crack whores, trailor trash, hayseeds, etc.

I a sense, natural selection has been reversed, the "fittest" aren't surviving, and the low-functioning are reproducing like rabits on the "fittests'" dime.