I think the question is, what is the best way to get politicians who aren't genocidal. Which is a specific case of the question of how you get change implemented.

I have seen people advocate for incremental change, and I have seen people advocate for revolution. The problem with incrementalism is that it looks like too little, and it's uncertain in direction and can be reversed. The problem with revolutionism is that absolutely nothing happens until a cataclysmic change occurs, and then it's absolutely not clear that the change is what people wanted in the first place.

Conservatives have achieved the monumental changes they wanted over the course of five decades. I find their goals repulsive, their methods disgusting, and their personalities (people in power) revolting. But I begrudgingly admit that their approach worked. They got absolutely everything they ever wanted, and their problem right now is that they, too, can't live in the world they decidedly thought they wanted.