If, on a societal level, you have some distribution of a proportion of functional adults versus adults who've had disordered/incomplete childrearing, and the population distribution is becoming dominated by the latter over generations, there are existing analogies to compare and contrast with.

Prion diseases in a population of neurons, for instance. Amyloid plaques.

Amyloid plaques are my greatest fear. One parent. One GP. Natural intelligence is declining. When I arrive at dementia in 20 years the level of empathy and NI in the general population will be feral. Time to book the flight to CH.

The plot of Idiocracy