Humanity. Developed and prototyped by Parity Tech. Tested during the Web3 Summit and discussed by @KarimJDDA and @gavofyork in their talks. It is a system with on-chain logic to anonymously prove that you are a human instead of a bot. Not to identify you by date of birth and legal name. Prove that you are human in a privacy preserving and decentralised way.(Polkadot)