Okay. Yes, in the absolute you or I could write a document and DECLARE it is binding on all the people. Semantics aside... for it to be valid, legal documents and contracts need what? They need the actual consent of the parties to it. Uni-lateral contracts are a fraud and extortive, and frankly not very nice....ever try to take a uni-lateral contract to court? Bi-lateral contracts are morally valid and legally enforceable.
A document that purports to be for everybody, but is written by and agreed to by the few is what? It is a claim of ownership others put on those who didn't consent to it.
Are you saying a bunch of old dead white guys can give the consent of people born hundreds of years later? Even, today, if you or a group of your friends that call themselves government make a "document that binds all people" , me and my friends might say, no thank you we are not participating in this. So if you deny us this and say, "no you must be bound by it" you are by extension saying some people can own and control other people. Why do you want to do this?