Two more thoughts. Firstly, I saw the movie and loved it, but do not think it is likely. Society would collapse long before it could ever happen. But, I do not see the entire population declining. what we may see is a shift towards a polarized society in which there is an intelligent, educated elite, and a large pool of fairly stupid people wallowing in their own filth. and the elite will find it that much easier to control and manipulate them, the more stupid they are.
But honestly, this would not be so different from the past. I don't think they were intellectually stupid, but most of history is made up of a large bunch of ignorant peasants living a day to day existence, having a bunch of kids, hoping some might survive to work the farm, and delighting in base and frivolous entertainments when they were not working from morning to night. meanwhile, an elite who can use their wealth to insure successive generations of education and means live an insulated life, often making their wealth off the hard work of the masses. Hope that doesn't sound too communist
But honestly, this would not be so different from the past. I don't think they were intellectually stupid, but most of history is made up of a large bunch of ignorant peasants living a day to day existence, having a bunch of kids, hoping some might survive to work the farm, and delighting in base and frivolous entertainments when they were not working from morning to night. meanwhile, an elite who can use their wealth to insure successive generations of education and means live an insulated life, often making their wealth off the hard work of the masses. Hope that doesn't sound too communist