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Monogamy May Have Evolved To Prevent Infanticide
sciencehabit writes "Human males and females have a strong tendency to live together in monogamous pairs, albeit for highly varied periods of time and degrees of fidelity. Just how such behavior arose has been the topic of much debate among researchers. A new study comes to a startling conclusion: Among primates, including perhaps humans, monogamy evolved because it protected infants from being killed by rival males."
and killing offspring is directly opposed to the core of evolutionary theory
Unless those offspring are in direct competition for food and reproductive access with your offspring. Then it makes a lot of sense evolution-wise.
Clearly you didn't read the article. The very study linked in the summary specifically compared 230 primate species, some of which are socially monogamous and some of which are not. And it explains why it *hasn't* evolved among all of the fairly similar species in the study using a model based on the infanticide rate.
There are almost certainly things to be picked apart in the study, but you need to understand the basic premise before you can start on that track.
and killing offspring is directly opposed to the core of evolutionary theory, which rewards the widest possible range of mates to guarantee diverse genetic combinations and the maximum chances for survival and spread of strong genes.
This may come as a complete surprise to you, but there do exist plenty of creatures out there that do kill the offspring and still haven't become extinct and there do exist plenty of creatures out there that do not kill their offspring and only mate with one or very few partners and still haven't managed to become extinct. Hell, there exists atleast one specific one that doesn't mate at all and produces only perfect clones of themselves, and still haven't become extinct. The point is, you cannot just lump different survival-strategies together like that and deny the existence or even the possibility for anything other than your one chosen one; what works for one type of a creature may not work for another, and the nature has the tendency of throwing all sorts of types of stuff on the wall and seeing what sticks.
Because there's no "design" to evolution. Whatever works, works. And there's not one "right" way to evolve. There's no reason for a feature that evolves in one species to independently evolve in other species (although it's possible.)
assert(birth_date<time-86400)
Just because someone else has a different hypothesis doesn't mean this one is wrong.
"First they came for the slanderers and i said nothing."
primates tend to be in bands
Except for the ones that aren't, like orangutans, a close relative of ours.
Mogamy happen because it takes a long time to rise the offspring, and it needs the support of both the female and male
That's one pressure. TFS mentions another. There can be more than one reason, and there usually are.
Tic-Tac-Toe, Global Thermonuclear War, and relationships all have the same winning move.
Can you explain why you *didn't* get into a car accident in the last month? What was it that you did that nobody else who got into a car accident last month did, to cause you to avoid all the accidents that could have happened?
You could say that Bill was drunk, or Alice was texting, and that's why they got into car accidents, but that doesn't explain how every single person that drove drunk or texted while driving didn't get into an accident.
What kind of explanation were you expecting?
Birds clearly have an advantage by being able to fly. If I said "Flying is not advantageous, because if it was, all organisms would have evolved to be able to fly", would that be convincing to you?
Here is a quote from Euripedes a writer from Ancient Greece where they had polygamy:
A second wife is hateful to the children of the first; A viper is not more hateful.
Monogamy evolved because it makes great furniture.
How does monogamy change who is in competition with whom? There is no evolutionary mechanism to enforce monogamy. From a purely genetic standpoint there is no benefit to monogamy for a strong male.
Articles like this are just freeze dried beef pasta boiled up in 100 gallon vats and thrown to the neckbeards who gobble it up while slathering vaseline and yanking each other off.
Shit isn't even pretending to be science any more. It's just some asshole in a lab coat leading a revivial in a Kentucky tent.
The argument is that your statement about a strong male being better off without monogamy seems right but isn't, because if strong males fail to stick around and ensure the children they conceived survive to reach adulthood and carry on the cycle, it won't happen, and their "strong" genes will be wiped from the face of the earth.
-1 Uncomfortable Truth
Humans, on the other hand, can have babies about once a year.
Women who nurse exclusively on average do not get their periods for 14-15 months after childbirth. Some get it right away, some go 2-3 years, but 13-16 months is the average, if they are nursing.
But I'm tired of so-called scientists making news stories out of un-testable speculations about how something or another could have been a factor in our evolutionary past.
Good thing that's not this story then, where the entire point of the paper was to test various hypothesis about monogamy. Seriously, at least RTFA.
"First they came for the slanderers and i said nothing."
Young women are attracted to young men who take unnecessary risks in extreme displays of their adult skills. Today it's smoking the wheels of cars, not so long ago it was jumping out of trees onto wild buffalo. Every hero in every action movie does the same thing, no matter what is thrown at the hero he gets up and keeps going, no matter what the hero blows up or how many bullets he shoots no innocent bystander is ever hurt.
Young women are not attracted to 'idiots' that crash and burn, they are attracted to 'heros' who's skills and strength keep them alive and healthy despite the odds. It's not a conscious thing in either sex, "cheating death" is an integral part of the human ritual of finding a suitable mate, it's so deeply ingrained in humans that a males brain chemistry will reward "cheating death" with feelings of elation, pride, and self-satisfaction.
Looking back as an old man who had the luck to survive the motorbike ritual (among others), young men really do behave like peacocks, the things they unconsciously do to attract a mate are even more dangerous to the individual than that ridiculous tail is to the peacock. At the end of the day it does make our societies (if not our species) better suited to the civilizations we invented. We are continually evolving and are in a feedback loop with the environment we have created for ourselves, not unlike the termite and it's air-conditioned fungus farm.
And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
Perhaps not. Maybe the mods objected to the misogyny.
It's used as a warning to others, so far Canada hasn't tried to invade us. That means it's working!
Been there. Did that.
Surrender of Detroit
Yaz>
I'd like to hypothesize that a lot of people are hung up on finding an evolutionary answer for everything. Sometimes things just happen in a species without there being an evolutionary advantage. Species are not hyper optimized. Sometimes things are just side effects. Sometimes I get a feeling that people like to anthropomorphize evolution, replacing a deity that designs with specific reasons and goals with a system that does the same thing. Especially with very fuzzy things like behavior.
Ie, I've heard people discussing the reason for grandmothers. This is a silly concept, unless your view of evolution is that it is a system that optimizes organisms. Maybe grandmothers exist because humans live longer than they used to, no need for a hand waving explanation. Others want to have an evolutionary "reason" for homosexuality. Yes, it's not a nice thought to think that it's a biological mistake, but it's certainly easy enough to think that it is because some genes are expressed at a certain time that caused various hormones to be produced at a particular time in development, and as a side effect of this slight variance in timing you end up with an organism that does not fit the standardized phenotype. May as well ask what the evolutionary advantage of preferring red heads over blondes is.
Humans are extremely complex, in a chaos system way. We have plenty of attributes that are not optimal for reproduction of the species, but they exist because they don't kill us off. But evolution is dumbed down for teaching purposes, even in undergraduate classes. People still recite "survival of the fittest" as if it's some sort of law. Others talk about "higher" species or "more evolved", which is nonsense.
As for monogomy, research among cultures around the world do show a consistent view that is "mostly" monogamous. Ie, serial monogamy with occasional cheating on the sly. That's universal. Yes, there are examples of cultures with polygamy, but even in those societies the polygamy is rare and when it occurs it is due to societal pressures (ie, a severe shortage of one gender, usually men due to wars), and at other times is restricted to just high class members of society (ie, to have more than one wife is proof that you are wealthy).
Long ago, I was at a good friend's house waiting for him when his wife asked me to help her with some small task that her husband normally would have done. So I did the work, and when I was done she thanked me, saying "The only thing better than having one husband is having two husbands!"
I immediately replied, "The only thing worse than having one wife is having two wives."
Yeah, yeah, misogyny is the buzz-word of the day ... which really means "if you challenge anything that could be construed to challenge a woman in any way for any reason, I'll pull out the misogyny card so that I don't need an argument". The term is about as robust as "discrimination" (which means "to choose"). The power of words...
Anyway, a friend of mine taught in Papua New Guinea for about 10 years back in the 80s. He lived there for that time (other than the occasional holiday). He was not a missionary - he was there for education programs. This is roughly what he told me a few years back (and re-confirmed when I asked him again)...
The men tended to stay with the men, the women tended to stay with the women. There was only a loose "sexual" association between men and women - and the offspring (when the men got randy) belonged to the community rather than a couple. The kids would go with whatever adult they wanted to stay with, sometimes months at a time. Over time, this social structure was forcibly changed by the missionaries to reform these hethens.
Now, this social structure was not monogamous in ANY sense of the word and involved little or no infanticide. Interestingly, it mimics (loosely) some aspects of Indonesian culture, although Indonesian culture has also been "westernised" to a degree, although I did see this sense of "community" that you don't get in the west ... front doors left open, people just coming and going into other's houses, kids staying at other families' house for weeks at a time - it was amazing to see.
Feel free to call me a misogynist too, since it's popular to throw buzzwords around. Whenever I hear the "m" word, my "wanker alert" light goes off.