One thing to remember is that an IQ of 106 means you are just about bright enough to walk and chew gum at the same time - and maybe live synergistically in an industrial culture. Below this, we're talking critters about the same level of chimpanzees, with a few perks like the ability to walk erect and perhaps mumble a few coherent words.
European Western civilization makes it all seem so easy, you'd barely guess that most of the population was just hovering around the barest minimal level to function peacefully without committing a violent and horrific crime on a daily basis. The truth is, our civilization has seemed so superior it begs to be regarded as inherently self-sustaining. It wasn't and now it is starting to show. The real story lay in the production of genius, which is higher in Europeans than any other race of men on earth. Between a handy population of savants coupled with a middle class just bright enough to be relatively law abiding and function according to the division of labor, observers got the impression this whole thing practically runs itself. It isn't as stable as Oprah gives the impression to her viewers, not a tenth.
Leftwing idiots are always describing how they are going to tamper with the basic formula, pull out the tablecloth without tipping the silverware, mix and match all kind of demographics and change the essential relationship between genders and do away with families.
Do you think if these morons (an IQ of 112 is more dangerous to a man than an IQ of 100) realized they are playing with matches in a football field filled with damp dynamite, they'd be so nonchalant? It all looks so robust and unassailable from their moronic point of view.
I favor using Sarajevo as an example. A few short years after the "Paris of the East" hosted the Olympics, it was an apocalyptic wasteland where starving wretches huddled in the ruins eating rat meat and cursing God. Another example of the natural trajectory of diversity.