A new study finds that sex and environment, not just age, strongly influence hearing sensitivity in diverse human populations.
A new study finds that sex and environment, not just age, strongly influence hearing sensitivity in diverse human populations.
The ability to not spend energy on reproduction and force mating with those who can. That’s why males are stronger, often larger and generally more aggressive and more domineering. It’s also why men are percieved as more intelligient and competent. Relative bodysize is what triggers the increased respect. After all, you shouldn’t piss off the largest, more aggressive male.
It’s the male meta. It’s more based on individual success rather than a benefit for a species. When a male is too “successful” it becomes beneficial for there to be a high turn-over rate. All to avoid too many siblings and subsequent incest.
Humans basically said F this. Women(or some female homonid) started killing their own offspring to avoid caring 15 years for a child they did not want to invest in. Embryonic wasting (menstruation) furthered this process. It’s why in most primates, the males commit the most infanticides. Humans are an exception. Infanticide is almost exclusively done by women. Usually postpartum related issues.
Monogamy became a thing as a result. Which subsequently decreased both male-male competition and female-female competition.
We invested in expensive brains at the cost of women’s lives. Which resulted in men also developing paternal instinct as well as the ability to give a damn and bond with something. Something that is far too rare in nature. Men who gave a damn about their offspring, took care of them. It became more a team effort. An interesting example is prolactin expression when exposed to their newborn, causing adaptations in the brain seen in pregnant women too. Another example is increased sensitivity to oxytocin. Allowing men to bond with their partner, people and pets! Males express less oxytocin in the brain, but human men simply adapted their sensitivity to it.
Kind of crazy to think human males caring for kids is a social perk not commonly found. Now that you mention it lots of other species males kill babies like lions and hippos.
And horses, most zebra species, elephants and elephant seals (by crushing the newborn. You have to see those 4tonne blubberfucks run at a female who just gave birth. It is glorious), rats, mice and many other rodents.
Some bears. Black or grizzly bear if I remember right, kills 14 cubs a year on average. They then stalk the female till she ovulates, mate and move on to the next target.
Primates in general. Mandril alpha’s sometimes kill their own out of aggitation. Chimps cannibalize orphans if the mother dies/gets killed. Sometimes female chimps are killed for being too assertive, or struggling back too much when males force mating.
Cats and tigers kill their own because they can’t discern nor care about decerning whose cubs they are.
Kangoroo’s don’t kill joeys per se, but they choke the female to death sometimes. Really just because they are as horny as they are aggressive. Females are always pregnant. When their pouch is already occupied, the embryo goes into diapause. Slowing down its development. A queue for the pouch if you will.
It’s only useful to the male. But energywise, it is detrimental for the female and the species as a whole.
In other words. Men are fucking awesome. We are much more like birds in our reproductove strategies. We form a partnership, and work together. Men and women developed ways to cooperate together. That’s awesome. It’s just that the chances of unwanted behaviours, come from “old habits die hard.”
Lol Might be shorter to list which species have males that bond with babies.
Here I am thinking about why wouldn’t I choose the “males dont kil babies” trait but that’s human morality speaking.
Not morality. Evolution. Morality came forth from it.
Our babies are expensive, and genetic diversity is valuable. So monogamy was better than 1 male and a harem. Men killing other men for threatning their child was a bonus. Thanks prolactin for angry papa’s. Basically momma bear mode, but with more muscle.
Plus, maternal death rate was too high to afford males killing our population growth. Thankfully, men took care of their infants together with wet nurses (men and their useless tits!). And women have a break on population growth. Making 2 children reach adulthood defines the amount of children women want. Had we kept this up, we’d be more succesful than panda’s! Those fucks won at life.
As for the list on males being dope. It’s much longer than you’d think. Especially in birds and lots of fish. Some frogs have involved parents too. Which is impressive considering their cognitive abilities are influenced by temperature! It’s just not common in mammals.