How do you reconcile this assertion with the fact that “In industrialized nations like the United States, close to half of all children whose parents divorce lose contact with their fathers shortly afterward. Within ten years, the proportion rises to two-thirds. For many reasons, not all of which have to do with male priorities, only 52 percent of divorced mothers receive full child support; for children born out of wedlock, the proportion receiving support falls to 32 percent.”

Quite clearly and demonstrably, a whole lot of men in these sort of cultures you describe as mainstream do not care much at all about the prospects or thriving of their biological children. What you're clinging to is a myth that does not bear out in real life.

Then, there are the myriad cultures from around the world (already named and resources about them linked) that routinely "invest" in children they didn't father. Pretending this is feminism instead of easily verifiable anthropology is a lame attempt at rehabilitating this sort of pseudo-science in a kind of pathetic sort of way that makes you look like a zealot defending his dogma, rather than a smart and educated person. Try a little harder next time . . .