I've argued before that the manifest differences between liberal and conservative all go back to core ontological differences. Is Man's true nature more individual or social? Is Man basically good, or evil? Is change ordinarily good, or bad? Since these questions are answered, like the question of light's "true" nature, in accordance with the instrument observing them, they cannot ultimately be answered, not with finality. So in that sense, I believe progressives and conservatives, liberals and libertarians, democrats and republicans, Labor and Capital, and so on, will be with us forever. Even more, I believe it essential these viewpoints are always represented--they are sides on the same coin, elimination of one is destruction of all.
Too bad we don't have Post of the Month, but even if we did, it's not likely that nominations would be accepted from the P&R Forum.
I've said much the same thing with regard to the social contract, but no one has ever pursued it, or even picked up on it.
There's nothing inherently wrong with an amalgamation of differing viewpoints. And for two hundred years, we muddled through reasonably well (we were at least the deciding factor in winning two world wars). That's why we're a federation. Unfortunately we are now in a phase where a seemingly-large portion of the population seeks a more feudal form, though it is more likely the case that that portion just happens to have the microphone. But we've been through this before post-1870. And it didn't last, at least not in that form.
But this isn't 1789, and I doubt that the public will be as patient. We'll just have to see.