On July 16, 1992, during his acceptance speech for the Democratic Party nomination for president, candidate Bill Clinton said:
As a teenager, I heard John Kennedy's summons to citizenship. And then, as a student at Georgetown I heard that call clarified by a professor name Carroll Quigley, who said to us that America was the greatest nation in history because our people had always believed in two things: that tomorrow can be better than today and that every one of us has a personal moral responsibility to make it so.
President Clinton considered Carroll Quigley his personal mentor. In other words, Quigley was a serious thinker, whose thoughts are/were respected by very powerful people.
Here's what Quigley had to say about the game of 'Democrats vs. Republicans'.
The National parties and their presidential candidates, with the Eastern Establishment assiduously fostering the process behind the scenes, moved closer together and nearly met in the center with almost identical candidates and platforms, although the process was concealed as much as possible, by the revival of obsolescent or meaningless war cries and slogans (often going back to the Civil War). … The argument that the two parties should represent opposed ideals and policies, one, perhaps, of the Right and the other of the Left, is a foolish idea acceptable only to the doctrinaire and academic thinkers. Instead, the two parties should be almost identical, so that the American people can 'throw the rascals out' at any election without leading to any profound or extreme shifts in policy. … Either party in office becomes in time corrupt, tired, unenterprising, and vigorless. Then it should be possible to replace it, every four years if necessary, by the other party, which will be none of these things but will still pursue, with new vigor, approximately the same basic policies. - Carroll Quigley, Tragedy and Hope: A History of the World in Our Time, New York: Macmillan, 1966
The left/right schism in America is pure bullshit designed to keep 'we the people' fighting with each other... instead of fighting together against them.