Respectfully disagree. Of the opinion that no (physical) subdivisions of humanity have particular behavioral qualities based upon their genetic makeup (culture and tradition is another thing).
Well if people are raised a certain way long enough wont it play out in the genetic selection? I mean generals can raise pacifists sure but if you cultivate enough warriors long enough SOME traits must sink through... this is all conjecture I don't know any antrhopology or that much biological pysch...
How about intelligence? Of course that isn't a behavioral quality, but it may greatly influence them. Somewhere I saw a list of IQ by nation. It was pretty amazing, places like the Congo had average IQ of 70. Not sure you can be "modern" if that is an accurate statistic.
Here is the table. Equitorial Guinea avg. IQ: 59.
IQ Range Classification
140 and over Genius or near genius
120-140 Very superior intelligence
110-120 Superior intelligence
90-110 Normal or average intelligence
80-90 Dullness
70-80 Borderline deficiency
Below 70 Definite feeble-mindedness
I'm sure there are problems with IQ tests, blah blah blah. But I think there is meaning there too, meaning that is so difficult to deal with mostly we don't.