I think you misunderstand the strategy of many moderates and centrists. Many have been unmoving over the years and we should note the stark rise in independent voters. There's this narrative that moderates and centrists compromise on everything and this too is propaganda. These people people just see value in some positions from each side. But the key here is cherry-picking. You don't take an issue like abortion and "compromise" on it, but rather you have an opinion that falls akin to one group. That may or may not be the same group who's opinions align with your opinions about taxes though. In fact, you even see the Libertarians trying to capture these groups by promoting themselves as "fiscally conservative, socially liberal." So don't buy into the propaganda.

> It REQUIRES a national level fix.

The US has a national election tomorrow. This requires individuals to vote for representatives that will adequately represent them in this manner. There is an individual role required to make a national fix.

I'd also ask, what to do when those national institutions fail? We've always, and always will, have to rely on individuals. This is both the power and vulnerability of a democracy (even democratically elected republics). It is the individual who votes. It is the individual who stokes or stamps the flames of extremism. Is always has been and always will be up to us. The alternative is autocracy. So please do not pass the buck. You have a role to play here and it is critical. Surely there are solutions that do not require us to go to civil war nor turn to autocracy. We're better than that.

I'm also going to leave this here: John Cleese's (of Monty Python) skit on Extremism. It is worth a watch, even just for a good laugh. https://www.youtube.com/watch?v=wXCkxlqFd90