Direct democracy—except instead of directly voting on legislation, voters vote on the desired effects of legislation and a metric for measuring if those effects are being achieved. The actual legislation is then written by specialists trained on effective policy implementation, who can adjust the legislation on the fly if it isn’t having the desired effect. Their mandate is limited by the associated metric—if they can’t meet the goals, they lose their mandate and the case goes back to voters for review.

A parliament.

The only alternative to an elected legislature (parliaments are different from congresses) is either direct democracy or one party rule.

representative government is pretty good

let's talk dumping the executive branch. those bums are worthless.

Anarchy’s free association. We simply have them split and control their own part of land unless there’s agreements to use certain parts of common land. Would work for everything except global warming.