Revolutions require principles.

Considering the contentious nature of the current presidential campaigns being run by both the Democratic and Republican candidates, I found the following quote interesting. By all accounts, we're living through what seems like a revolutionary period in American politics.

But it is the essence of a revolutionary power that it possesses the courage of its convictions, that it is willing, indeed eager, to push its principles to their ultimate conclusion. Whatever else a revolutionary power may achieve therefore, it tends to erode, if not the legitimacy of the international order, at least the restraint with which such an order operates. The characteristics of a stable order is its spontaneity; the essence of a revolutionary situation is its self-consciousness. Principles of obligation in a period of legitimacy are taken so much for granted that they are never talked about, and such periods therefore appear to posterity as shallow and self-righteous. Principles in a revolutionary situation are so central that they are constantly talked about. The very sterility of the effort soon drains them of all meaning, and it is not unusual to find both sides invoking their version of the “true” nature of legitimacy in identical terms. And because in revolutionary situations the contending systems are less concerned with the adjustment of differences than with the subversion of loyalties, diplomacy is replaced either by war or by an armaments race.
— Henry A. Kissinger, A World Restored