Homo Sapien is a manogamy species... which is a fact
why?
Males produce sperms which are cheap and abundant. It would
greatly benefit the spreading of their genes in the human gene pool
to have more sex with as many partners of the opposite sex as
possible.
This leads to the tendency to "cheat" on the opposite sex
because raising a child require resources. A male can fertilise the
female and leave. Females on the other hand are stuck with the
child. As the only way females can spread their genes is by having
offspring of their own, all the resources needed to raise the child
would end up coming from the female.
To prevent males from spending minimal resources(sperms) and
having their genes spread like wild fire in the gene pool. Females
are stricter in chosing a male partner who will share the cost of
raising the offspring together. Having multiple female partners
means a particular male have to spread out his resources among more
females. This would certainly favour the males over females.
Hence females perfer manogamy. And it is because of this humans
have become a manogamy species. Males will always have a tendency
to cheat... hence they will prefer polygamy.
It all has to do with the amount of your genes in an offspring
and the amount of resources you put into raising the offspring.
Polygamy will not come back cos it is not an evolutionary stable
strategy
