Humor? seriously? yeah sure that might be a modern trait, but out in the bush the best man is the one that can protect you from being raped silly by other men, the best man is the one the bets you "because he loves you" as the yanomomo women say to each other. In fact look at how many women today stay with their abusive husbands and just take it, possibly an instinct? As for rape the female reproductive track is rather good at expelling semen, the chances of pregnancy per sexual intercourse is quite low in fact about 2.5% or less. Usually said children were raised horribly in ways that question if their minds could not have been damaged much more then simply not taught language. If you were chained to a toilet in a white windowless empty room from infancy with almost no human contact you would probably have difficultly perceiving colors and objects. Yes, but we also have evidence that humans were killing each other since before the dawn of man (chimps do it!). But yes we have changed a lot in the last few millennia, consider the rate of lactase persistence for example, proof that we can institute changes to our "nature" in just a few dozen generations, in short we have been domesticating our selves. Feudalism is practically slavery. I doubt productively has much to do with these systems for those governments, more to do with balancing the needs of desires of people with how well they could be controlled, its why say slavery was very popular in the United States's early years because it was not only very productive, but the slavers were very easy to control. Rome not so easy to control, Japan, easy to control as serfs worshiping the emperor. The society evolves to the technology and resources of its time and place, slavery is thus not less productive then freedom, just less productive then the cotton gin. ... "Civility"? as in the adjective of civilization. Even the Mennonites you so love have civility, they live by social order and rules and internal government based on strict following of their interpretation the bible with punishment of banishment. Nothing to do with language, nada, we have no proof that language is required for human level intelligence, none, it is merely hypothetical. Well for the poor and wreckage its a benefit over all not a "cost", everything has pros and cons, you look a public education as a means of programing people into societies cogs, I look at it as a means of trying to give everyone and foundation in knowledge so that they have a chance to understand and improve the world rather then forming hordes of morons that riot and burn down the libraries and destroy civilization leaving the world in darkness for a thousand years. Likely it may very well do both these things but the latter pro out weighs the former con. Hence all the education in things like science, math, geography, civics, world history, etc, etc, because when your working in a factory you will be thankful you had to take the class in 6th grade about why Rome fell. You know I somewhat agree with this idea: we know have the technology to get rid of class room and school books and just sit kids in front of a computer or tablet several hours a day, that machine will feed them more information more accurately and more enjoyably then some old hag teacher that speaks in monotone and believes a good paddling is the solution to any child's problems... oh wait the machine, that not "natural". As for the parents: some of them give a shit about there kids, are horrible abusive parents, who would more likely hock their kids computer for money to buy smack then upgrade it into the teaching aid. Public schooling provides some kind of standard. Yeah that is a stretched hypothesis. As for a free lunch, I would say from my perspective of not living in a jungle starving to death or dying of disease or being murder by a rival clan that we live pretty fucking well off thanks to standardize education and all of the other aspects of modern civilization! Yes we have our flaws in civilization but its simply does not compare to how bad things are without it, its practically like being born with things for free in comparisons, food, shelter, health, peace of mind all costing a tiny fraction of the hard work and vendetta killing spree (so that no one will dare think they can fuck with you) require to do it without civilization.