Its probably along the lines of the movie Idiotocracy where the dumbest of the dumb breed like rabbits and the high IQ wait until it is too late to have children or at best manage 1 child...
Over time the natural occurs and the offspring of the dumb outnumber the offspring of the "smart" (not so smart I guess) and as has been established there is a significant DNA contribution to intelligence...
Of course in the Australian context by subsidizing welfare moms and giving them financial incentives t have baby after baby while penalizing intelligent working woman for having babies the inevitable dumbing down trajectory results...
Of course our leftist infiltrated and corrupted education system, focussed more on brainwashing kids with AGW hoax foolishness and making sure that they are to frightened out of their minds to be able to think clearly and question AGW cult dogma puts another piece into the puzzle...
