And what do you call this? survival? Is it survival in western countries too?To you that seems like it's hypergamy.
To me it's just survival, with the feminine imperative pushing women to get the most out for her and her future offsprings.
Feminine imperative = Her survival 1st (inclusive lifestyle) and 2nd that of her offspring.
It's in all women, in all countries.
It's biological not cultural.