Pondering the Mail-Order Bride

I had another thought about Western romances.Does the reason the "mail-order bride" plot is so popular in Western romances have anything to do with the idea that marriage is linked to civilization? In that case, marriage could be civilization, and imposing it upon two people can be likened to imposing a farm onto a wilderness, or law upon a den of outlaws.True, the mail-order bride isn't usually