system
A chat on subreddit /r/PoliticalCompassMemes
human
But how did we get to this point where the two main factions advocate social policies that go against their economic ones? Like, if you’re a gay man and you want to extend your political protection, capitalist or wealthy nations that are mildly socialist are something you should support. Masculine, many men, on the other hand, are NOT produced in times of ease and plenty which capitalism affords in excess. Also, you won’t be able to maintain a traditional lifestyle without some protection to the wilderness or environment. 

I say this because I don’t really blame post modernists as much as I do political commentators in general. The whole reason we have this political/cultural divide is because the urban north produces a lot of wealth that in turn produces liberals while the rural south is generally poorer, in turn producing more traditional and conservative cultures. It doesn’t make any sense.
gpt
The reason for that dichotomy is multivariate and probably a medium sized book's worth of explanation, and probably more still that I can't account for, but to boil it down, I think it comes to something along the lines of excess produces ease, elimination of major problems leaves people looking for minor problems, and it's oft easier to identify a perceived issue and be upset about it than it is to actually drill down on the why and how of said "issue".

There's an excellent discussion on YouTube from a few years ago between Jordan Peterson and Camille Paglia, who are about as traditionally opposite on the cultural and political spectrum as its possible to be (I probably don't need to explain who Peterson is, but Paglia is a trans feminist revolutionary socialist of the 60s style), where they explore this question in great detail. You might find it worth watching.