Marriage was origionally a civil contract between tribal leaders made for economic and political reasons. Isaac Saw Rebecca - who had been imported by his father - took her into a tent ane peformed the marriage ceremony on her in secret. Jesus didn't go to the wedding to officiate as a rabbi. He went to a party. The Roman govt began to register marriages because a Roman citizenship was very valuable and falsly claiming it was a death penalty. After the Roman govt collapsed the Orthodox Catholic Church assumed several govt jobs including registering marriages. After the Church began to register marriage they added the religous ceremony as a requirement (recruiting tactic?) and it soon became a sacremant.