Dark ages laws and contracts belong in the dark ages, along with dark ages fairy tales.
Freedom of the individual against the arbitrary authority of the Despot, Common Law principle, The right to due process, Freedom of movement, Tax and Duty regulation, some women's rights, proportionate punishment, fines and levies, the right of an owner to be paid for services or goods, protection from accusations based on the word of a single person, to name but a few 'dark age' laws that form the basis of our modern justice system and legislature. Perhaps they all belong in the dark ages also?