Earlier quoted context omitted.
If you want to balance a system dynamically, you want negative, not positive feedback loops. The latter will just grow until they shake the system apart. In other words: polarisation is useful when it's transient. Some issue causes people to divide and work out some consensus, and then divisions die down. A persistent divison that becomes its own end is destructive.
We basically have an efficient system where two sides constantly adjust their positions so that elections are won basically on a knife edge. The system demands competition, and if that competition doesn’t come from outside (eg there is a war), it won’t simply disappear. Actually, doesn’t China do that? It paints it’s people’s struggles as them vs the rest of the world. Maybe they don’t need political competition beca…
Yeah, but what's the system efficient about? Not figuring out correct solutions - the internal competition demands both sides to define themselves in terms of doing/believing the opposite to what the other side does/believes, so the system is just doing a random walk. The way I see it, it's primarily efficient as a way to grow the market - ever-increasing campaign budgets and ongoing political shouting matches are just funding advertisers and news agencies.