Were those strategies really key to our advancement? Are they still the key to our advancement? I entirely agree with the necessity of taming our base instincts when it can be shown to be useful - but does repression of our sexual desires really achieve anything worthwhile? Or does it just help create an awkward, emotionally repressed society of frustrated people? I would tend to look at love and emotional openness in a similar way - even more repressed and likely to be more valuable.
The comparison to chimps is interesting... most people tend to look to the animal kingdom for examples of balance and harmony.
Would the lack of 'rape' really be such a terrible thing?
I don't necessarily argue for a particular view either way here - I'm arguing for the consideration of all angles and the reduction of basic assumptions handed down to us through the generations.
Good idea to question every assumption.
There are various possible reasons for the development of monogamy in humans and there has been little study into the subject. I have a lot of thoughts on this. (Surprise surprise).
Monogamy exists in a very few animal species. The harem is a more common arrangement, and there is promisucuity in other species - or in the case of some spiders, the male just gets eaten by the female after mating.
Levels of promiscuity are related to race to some extent but to culture to a larger extent. For example, there was strict monogamy in ancient Germanic society, but remarkably less so amongst Vikings, and less still amongst the Celts.
The Celtic and Spartan women unashamedly would sleep with the best men in public - and the women had a huge amount of status in these societies. Their husbands did not prevent this (not that it necessarily occured to them that they wanted to). Husbands could be shared too presumably. The women were not coerced by the men. This practice was eugenic in that it contrasted with the way the Roman women behaved, sneakily having afairs with the worst kind of men, and is more eugenic than monogamy that forces the less attractive women to settle for less attractive mates. They could have one man as a husband, but get pregnant by another.
It has been estimated (some decades ago) that about 10% of British kids were not of their supposed father. Seems like a lot of women don't necessarily want to get pregnant by their husband, and maybe they are finding someone with better qualities?
Sexually transmitted diseases must influence sexual practice to some extent. I would argue that the ancient Germanics may have developed their strict rules as a reaction prompted by the fact that monogamy is the healthiest option when there are STDs around. This may have happened where they were, and not been a problem for the Vikings, Celts, and Spartans. Plus, sleeping with the best men probably is safer than the Roman women's habit of sleeping with the worst as far as STD avoidance.
Another explanation for these differences of sexual mores could be simply a trend, no more than a fashion of behaviour that caught on because there were some influential individuals behaving in that way, or advocating it. That sounds somewhat like the idea that the 1960s fashion has ushered in a more sexually permissive trend. Sounds reasonable?
Polygamy (one man, several wives) is more eugenic than monogamy, because the least fit men would tend not to get a woman. The problem with this is that there would be a lot of aggrieved men who could destabilise society. An arrangement where only one wife is allowed per man may have been aggreed in some societies, to counteract this problem.
Cultures where there was particularly much indiscriminate sex would spend much time on fucking, and less time on developing civilisation. That's another point. Plus there is better chance of having well adjusted children who survive and have quality children of their own if they have a family structure with a father and mother. Selective pressure may have resulted in this being the way most people feel drawn towards behaving - as an instinct.
This being the case, a return to extreme indiscriminate promisuity would be detrimental to the upkeep of civilisation - not just because of doing sex rather than some other activity, but also because of the family breakdown and the negative consequences to do with jealousy, lack of trust greater violence (lack of self control) and spread of disease.