Conservatism is the idea that some people are arbitrarily better than others, by birth or breeding or wealth or whatever. America became an aristocracy of evil-doers, a street gang with massive financial backing. Basically, venture capital levels of investment and organizational acumen applied to crime.
America's rich seemed to be a nasty bunch, maybe because we were new at it, the country not having a traditional aristocracy, or because they got plastered on the natural resources availabile on the continent. Really stoned. Normally these assholes have trouble winning elections in a democracy.
What are they going to say, vote for me so I can screw you some more? That won't work. So they say vote for me I'll screw somebody you don't like (more than I'll screw you). Black people, prehaps. Immigrants. Commies. And, guess what, America had a revanchist, racist subculture with a huge grudge.
The Confederacy. Got their asses kicked in the Civil War, never admitted they were wrong and created a culture based in lies, delusions, fantasies of retribution and a return to power as an authoritarian, racist ethnostate. And so here we are, with an aristocracy rooted in degeneracy and hate.
It worked as one would expect for a while. The already rich got richer and took over the political system. The racist, crazed cultural conservatives were kept at bay until they weren't but then they demanded their reward in a racist government that screws its own citizens and anybody it can.