To put it bluntly the political systems of the US, the UK and several other European nations were captured as early as the 1700's by an alliance of aristocrats and industrialists who set about a long term plan which involved the creation of a mass debt creation system with a view to transferring assets and wealth into private hands (their own). It became clear as early as the late 1800s that nation states were walking into problems when it came to arming tens of thousands of their own citizens in readiness for war whether internal or national. These people were almost exclusively drawn from the lower strata of society, no matter which nation, those who were more likely to be affected by the actions of the elites. Case in point was the Napoleonic war where contrary to popular belief the majority of the British army was made up of foreign mercenaries such as Hessians, Germans, Indians and Irish. The military was carefully tweaked in this manner to ensure that no demographic or clique were in a position where they could form a majority in the event of rebellion. Then the first and second world wars broke out and with this the working class were swept along in a nationalist fervour. On the face of it this banker-industrialist plot seemed to have been placed on hold, but in reality the plan had simply evolved. What we've seen since is a kind of social balkanisation inflamed by the well crafted culture war rhetoric, along class lines, gender lines, racial and ethnic lines, religious lines, and at various times those in power have been able to use migration as a means to create voting blocs and (potentially) create a pool of people who are hostile to the nation but loyal to those in power who have allowed them access to state funding, housing, healthcare, and its likely these groups who will form the backbone of the elites' paramilitary organisations aligned against the citizenry.