If you are really interested start looking at when we went from a hunter/gatherer culture/society to an agrarian culture/society. Also compare the marriage history of the Greco/Roman area with marriage history of the Celts, Germans, and Norse in their area.[/b]
Maybe we need to define "tradition". The tradition began sometime in, well, in the
beginning. What the history of each ethnic or people group is doesn't really interest me.
My question of a rough date was directed to 4ager. I was being sincere. It sounded a lot later than that to which I was alluding.