IRL state borders in the modern sense didn't really even exist until about the 1800s to begin with, and only in exceptional cases do they form an insurmountable barrier to human movements. Practical economic concerns and the like are normally a rather bigger one (hence the earlier about problems of distance and the means to deal with them).
Hell.
Last I heard marrying a native is generally one of the easier ways to get naturalized.
In premodern context a far more relevant worry would be if the couple's respective relevant social units (families, clans, tribes, whatever) have some kinds of hostilities going... and I don't want to even think about what kind of sand this will throw into the gears of upper-class dynastic calculations. Probably just results in a widespread practice of adopting heirs if necessary, many IRL societies have run with that for a long time anyway.
Well, I was thinking more of what happens if eg.
Culture X views the string as Fate and thinks red stringed couples are romantic. It doesn't particularly care about marriage but red stringed couples are (socially) expected to have fluffy romantic times. If you're stringed with someone and aren't having diabetes-inducing sweet times, there must be something wrong with you.
Culture Y views the string as the Blessing of God, red stringed couples are required by law to marry, and you cannot marry anyone except the one you have a string with. It doesn't matter what age, gender or relations you have, if you are stringed to someone, you are getting married. Now. (this means people can get married to babies, their sister, their parent -eg. son to single mother, they don't care. If you have string, you are getting married)
Now, this wasn't a problem when X and Y were on opposite sides of an ocean. But then someone invented the steam ship and now travel between X and Y is possible. Red strings appear pointing to the other side of the ocean...
I am assuming here of course that strings don't appear between people who have no chance of meeting each other.
last edited at May 8, 2018 10:21PM