One common idea in the manosphere is that of the foreign bride. The general concept is to find a bride from either the old Soviet block or from the third world, one that would hopefully be unspoiled by modern Feminism.
I do have much anecdotal evidence on this. It seems to work out as one of two extremes; it goes as the fella has planned, or she turns into a femzilla. Not so much in between for some reason.
Let us consider these two types of results. Growing up in tough situation, where traditional rules apply, can make one humble and appreciative. That used to happen regularly in western countries also, though it can still sometimes still be found. Anyway, it all becomes internalized as a youth, and never goes away.
In modern times, there is another possible result. When one grows up in a tough situation, there are trickles (or more) of Feminism that get through. Magazines, the internet, TV, etc. all tell girls that they are great and that they are (or should be) empowered to have whatever they want. So what does empowered mean in this case? I will let you use your imagination on that.
If you are looking for a foreign bride, check her out very closely. Look at the family that she came from. Use the test of time, as hints (for both good and bad) will come out when you least expect it. Caveat Emptor