And education is the key. If people's attitudes are gene based they the attitude can NOT be changed. as I pointed out before blacks within 2-3 generation of moving North see a drop in violent crime. People removed from violent households at a young age also tend NOT to be as violent as people raised in such violent households. Thus the level of violence of a person seems more dependent on his culture than his genes.
Now there are exceptions to this rule, but those exceptions exist in Violent cultures as while as peaceful Cultures. The Classic example is the Vikings "Berserkers" and the more modern situation of the Malaysian concept of "Running amok". Both seems to be people with high rate of violence even for the violent cultures they were in. These are EXCEPTIONS Not the rule, and the general rule is what we must look at.
Some references as to herders and Violence:
http://www.reliefweb.int/rw/RWB.NSF/db900SID/SJHG-75E9DK?OpenDocumentA comment from a paper I found on the net about how various societies view the afterlife which shows that herding societies have a much higher level of expectations of violence than hunter-Gatherings societies and farming societies:
"vengeance played an important role in the afterlife in societies that practice animal husbandry,
but not in plant-agricultural or hunter-gatherer societies;"Further in on that paper:
It has been demonstrated that the type of subsistence a society engages in can have a strong impact on the social behavior of individuals within that society and that social behaviors may differ from society to society as a function of types of subsistence. For example, Cohen, Nisbett, Bowdle, and Schwarz (1996) revealed a strong link between the patterns of subsistence and patterns of violence in both the southern and northern United States. Specifically, it was shown that the South, which was originally colonized by herding people, has a much higher incidence of violence in their culture than does the North, which was colonized by farming people. They made the argument that the primary resource of herders, cattle and other types of livestock, are much easier to steal than is the primary resource of farmers, which is land. As a result of this high risk of theft, herders have to protect their cattle with direct violence and aggression against the thieves. This aggressiveness became indoctrinated in the culture of the South and this ‘Culture of Honor’ currently persists, though there are very few herders today. Farmers, on the other hand, are not at risk for losing land to thieves, and thus can live a much more peaceful existence.http://pigeonrat.psych.ucla.edu/afterlife.pdfAnother paper on Culture and genes:
http://www.uchicago.edu/aff/mwc-amacad/biocomplexity/conference_papers/richerson.pdfQuote from that paper:
For example Tomasello’s group used human demonstrators of a raking technique to test the social learning of juvenile and adult chimpanzees and 2-year-old children. The demonstrators used two different techniques of raking to obtain otherwise unreachable, desirable objects. Control groups saw no demonstrator. The demonstrator had a big effect on the use of the rake by both children and chimpanzees compared to control groups, but the interspecific difference was also large. The children tended to imitate the exact technique used by the demonstrator but the chimpanzees did not. In similar experiments with older children Whiten and Custance report rapid increase in the fidelity of imitation by children over the age range 2-4 years, with adult chimpanzees generally not quite achieving the fidelity of 2 year old humans. Human children already at quite young ages are far more imitative than any other animal so far tested, although a very few other animals, such as parrots, are also about as good as chimpanzees at imitative tasks (Pepperberg 1999).The above support my point, Culture is very important to how people think and act, often more important then genes (It is from the genes people have the ability to LEARN their culture, thus you have so much interaction between the two).