Time to add another thing to Drake equation: Fb - the fraction of civilizations who didn’t fall prey for proof of work consensus. Others are invisible, cause they are very advanced, but all they do is mining crypto for food. To eat a sandwich you have to prove that it’s yours and a consensus is that it costs few MWh. Small islands of non-crypto trust appear millenia by millenia, but they are slowly marked as communism and disbanded by military consensus. It would be much faster, if military smart contract balance legacy didn’t require a petawatt-hour to sign one resolution with all conditionals, involving century-long testing of its code. Thankfully these groups do not form too often, because when you’re born, there is already a set of smart contracts that your ggggg-parent signed for your kin to obey. Maybe your ggg-children will have a chance with other families, if they manage to meet in the same aeon.