While I have not read this source personally it should be noted that most scholars treat sociological papers from this era about other cultures as somewhat embarrassing. They are usually written from a western civilization supremacy perspective. They tend to be poorly researched on the culture of the groups they are writing about because it is assumed that it must be inferior to western culture, after all the people are mindless savages are they not, what could an obviously superior western academic possibly learn from them. The fact that the paper covers numerous cultures makes me even more suspect.