Herbex - "(where health and youth were more important to men in selecting mates, where wealth and status were more important to women)"...wotalotabollocks. Women have always liked health and youth as much as men, they just weren't allowed to have it...."
First off, the human rights position is that people should be able to have relationships with whoever they want and marry whoever they want. Finding out that there are somewhat different evolved preferences between men and women would not change that one bit (and there is no need to argue against evolved difference in order to make the human rights case).
That said male and female reproductive systems in humans are quite different, and it would be quite odd if this hadn't resulted in evolved preferences as it has in every other animal.
In humans:
- females usually have surviving children that number in single figures.
- females are born with all their eggs in place, as we get older chances of birth defects and difficulty in conceiving get higher.
- females reach menopause
- females have hidden ovulation which means they can hedge their bets about who fathers their children, and who brings them up.
-babies are strongly dependent on the mother for the first two years
-males can have surviving children in the 100s (if they can afford to support them)
- males make fresh sperm all the time, so the impacts of age or of a spell of illness or poor nutrition on later fertility are not so great.
-males can continue to father children until much later.
- males don't play a particular biological role in child survival, but can contribute resources which make a significant difference particularly in harsh times.
For most of human history we were hunter gatherers or subsistence farmers, life was hard and survival was not assured. Being an economically independent single mother was not an option. To raise a child through the dangerous early years took the resources of more than one person, so the way that people related and shared resources between birth families - parents, children and siblings, and between sexual partnerships were part of the survival strategies that evolution would have selected for.
Given the basic biological factors I have outlined males would have evolved a stronger preference for youth and health in their mates (less likely to be carrying another man's child already, more likely to conceive and survive childbirth) and for females to have evolved a preference for status (can he support me and my child?) and be less worried about age.
Social constructs then build on top of evolved preferences - and also reflect the fact that parent's evolutionary pressures (to maximise survival of grandchildren accross all their children, is different from their grown up children's evolutionary pressures (to maximise their own surviving children,while not disadvantaging their siblings too much) - so you get conflicts between generations, as you point out, and social structures that are not supportive of our modern conception of human rights.