From Z Blog's The Elite Monoculture:
... the better way of looking at the great divide is between those who think there is a perfect social arrangement and those who do not. The former imagine there is a perfect way to order human affairs to achieve maximum happiness. That perfect way is both discoverable and achievable. Morality dictates that anything and everything be done in order to reach this state of social perfection. The Rousseau-ists are entirely focused on the end and are willing to use any means necessary to achieve those ends. It’s why the body count for the various Rousseau-ist cults is staggeringly high.
The other mode of thought rejects the notion that there can be a perfect arrangement. The human condition is immutable. The best we can do is incrementally improve the material state of society by adding a few grains of sand, each generation, to the foundations of society. That necessitates preserving the traditional institutions, while adding to them as they are the storehouse of knowledge, built up over countless generations through trial and error. The Burkeans focus entirely on the means knowing the ends are beyond the ability of man to perfect.
and
One side is willing to use any means necessary to reach the promised land. The other side is restrained by the means they will tolerate and they are willing to accept less than optimal results. If the people prefer high tariffs, for example, that’s fine as long as it is debated and enacted in a constitutional process. The Right can argue for something on rational grounds, but accept less knowing that people are seldom rational. That’s the claim, least ways.
That would be great, if it were true, but it has not been the case for a long time now, at least in American politics. In fact, what we call “conservative” is pretty much just the same stuff we call “liberal” but with slightly different ends...