Those of you who have been following me for some time are likely aware of my hypothesis that there are several sub-species of humans. This might provide a good explanation for the preservation of both psychopathy and herd-animal behavior where the herd-animal actively participates in their own enslavement and abuse. In other terms, we might refer to these two sub-species as Morlocks and Eloi. The active cooperation between Morlocks and Eloi (eaters and the eaten) in the modern day Demon-Rat party would be one expected oddity.
But the problem hypothesis actually goes rather deeper than that. Is it possible that "modern" man, now called Homo Sapiens, is actually a cross between a member of the chimpanzee family (perhaps something like a Bonobo -- which is extremely apathetic about where it is getting its jollies, as long as it is getting a lot of jollies) and some variant of a swine?
A reasonable case can be made for that, and I suggest we do our utmost to "follow the science" rather than dismiss it as not PC enough.
As one of my colleagues has already covered this possibility in considerable depth, I will just link to that now:
http://www.macroevolution.net/human-origins-2.html
with the unpleasant backstory on genetic crosses here:
http://www.macroevolution.net/human-origins.html
cf. http://pmc.ncbi.nlm.nih.gov/articles/PMC6980311/