it's called Rat Utopia.
Been done...

NOT happening to humans...as I said earlier. All first world nations (that would be the US, Europe, Austraila, japan and others) are experiencing a population DECLINE. The only reason the population of the US increased was due to immigration.

In fact the only place where the population is (supposedly ) growing is Africa,(perhaps china and India) and that's based on Estimation...not head count.

Like I said...it's to the advantage of those ruling classes to estimate HIGH. They get more 'foreign aid that way. Even if the population was in decline they'd say otherwise.