BRex21 said:
It does not prove humans are polygamous by nature, but it strongly supports it. If competing with multiple sex partners was such an issue that the by-product was a population whose very physiology is prepared to fight off competing partners even to its own detriment it would certainly imply infidelity. In the event that ancient humans were primarily monogamous our ancestors would have higher chances of reproducing if sperm were more benevolent towards one and other, and at the very least shape and behaviour would provide no advantages, at least none that anyone has seen.
Wouldn't this indicate that nature was strongly against polyandry only? I don't seem to understand how does this support polygamy; in my opinion, it only shows that women having multiple men was not desirable so penis evolved to eliminate the possibility of women being fertilized by the previous mate, which means that the penis (men) didn't want competition (which, in turn means, that women should only have one mate). Besides, as women can only be fertilized by one person at the time and then have to invest much more resources, time and energy into pregnancy and birth, polyandry as a biological mean of reproduction is quite silly (if we're talking about instincts and pure biology, not taking into account how many women today don't care about reproduction and want multiple partners to have sex with for pleasure).
Polygyny though, makes sense, especially if the population lacks in numbers (men specifically), as one man can easily fertilize all women in the village and bear a hundred children within a year. So if the population ratio is more in favour to women, it would make sense for one man to have multiple women, to maximize the potential of the population, by every woman bearing a child (say, the ratio is 80:20, if the population was monogamous, only 20 women would have a child, while a remaining 60 would be left without a mate and without the potential to contribute more people to the society, and that would not be good for such a population). It also makes sense for a highly patriarchal society where only men can earn and contribute to the society so they would be doing women a "favour" by taking multiple women and taking care of them and their children, leaving less women and children in poor conditions.
However, I don't think what we are "biologically" or "instinctively" matters really. We have a civilization and what we were thousands of years ago has no place in today's society. I have nothing against polygamy in general, but it would create numerous problems; legal and population problems. Wealthy and/or good looking people getting the exclusive possibility to mate and reproduce, while large chunks of people would not have any possibility whatsoever to get a mate; in today's world, that would be problematic (a similar problem already exists in India for example, where, due to traditions, it is frighteningly common for a couple to abort if they are told they're expecting a daughter; in some places, it already created a vast difference between the number of men and women and many men know their entire lives that they will never get a mate. It probably produces a hostile, highly-competitive environment with a lot of tensions). Also, by only a small chunk of the population actually reproducing, wouldn't we kinda lose the genetic diversity (assuming that polygamous people would be a significant part of the population)? Of course, legal problems can be fixed, but it would require quite a bit of fixing and law changes. As I said, I don't have anything against polygamy in general, but I do consider it to be somewhat... backwards (though, I am probably being subjective). Monogamy creates a better environment for children, because the parents know it's their only offspring and they invest more in it. Going around, fathering and mothering dozen children like it's some type of a commune where children don't know who their parents are, doesn't sound like a healthy environment for a human being in this day and age, because no parent would feel obligated to invest in some of their offspring, or they would invest in a "favourite" one, while neglecting others. Of course, there will be polygamous couples that don't want to reproduce; what I mentioned is only the extreme example which shouldn't be taken as absolute truth because it isn't. There is no way of knowing how would it develop. Still, I don't think our biological preference for polygamy or monogamy, whatever the preference is, should influence our final decision and laws. Times when we lived by applying the laws on nature on our society are long gone. I see no reason to act on something simply because it is "biologically correct". If you are genuinely polygamous and you find polygamous partners, it should be enough of a reason. Some people are like that, just as some people are gay, despite the fact that in the past, I highly doubt that polygamy was introduced because "some people were like that" and not because of political reasons, patriarchal traditions or the stabilization of the population.
Personally, I would not be able to live in such a relationship. I don't really understand how someone can be comfortable while knowing that the person you love has a relationship with someone else too. Maybe that's just my selfishness talking, but if I like someone, and someone likes me, I don't see the place for a third, fourth or tenth person in the relationship, I should be enough, and if I'm not enough, then the person doesn't like me that much after all, and we should part our ways. However, those who are comfortable with it, are fine by me. I just believe it's not yet the time for such relationships to make a legal comeback to the society; many things have to be settled, changed and fixed for it to function properly, (though, some alternatives would be okay) and we still haven't even fixed the laws about two people in marriage, regardless of gender (with some exceptions, I saw someone post a link to a legalized polygamous marriage in, surprise surprise, the Netherlands). Also, another reason for my personal disliking of polygamy would be that I don't want some wealthy hot bitches to hog all men for themselves, and leave us poor, average, less fortunate souls mate-less for life
