The issue with humans is that when everyone has the responsibility, no one has the responsibility. The moment those kids are 'raised by a village' or however ma

The issue with humans is that when everyone has the responsibility, no one has the responsibility. The moment those kids are 'raised by a village' or however many participants of the family, it automatically becomes a lot harder unless, somehow, the tribe is much more cohesive and can reinforce effectively the same rules consistently. << "traditional" gender roles do not alleviate this. I would personally argue that the "traditional roles" seem to help the offspring on several levels, but I didn't see many studies ( as opposed to non-traditional that is ) to that effect.