One solution to the identity question is to publish biometric data in a blockchain. There currently is a fear that biometric data needs to be kept pivate, but if people are willing to make biometric data public, the identity problem is easily solved. Any questions or disputes about identity can be resolved by an in person examination of a person's biometric features to see if they match what was published on the blockchain. This also can prevent sybil attacks because published biometric data in the blockchain can be scanned for duplicates.