The quran was authored by an arab bedouin. Is every muslim an ethnic arab bedouin? No? But they are basically all corrupt and rapey and head choppy. Pakistanis. Sri lankans. Rohingya. Albanians. Muslim philipinos. Indonesians. Chechnyans. Bosnians. Even christian nigerians complain of how violent Muslim Nigerians are. How come? Magical book? No. Their rule set (pig out on as many women as you can afford) had an unintended GENETIC consequence. When the most violent, greedy, sexually agressive men are allowed to be 4x as reproductively successful as THE AVERAGE man in the community, the population is FLOODED with genes for greedy violent rapists. Polygamy incentivizes rape, violence, child brides, economic stagnation, low IQ, economic disparity, low trust, corruption, incels, ... I could go on. Its basically an evolutionary certainty. Quran was the basis of the rule change. But the mechanism is purely evolutionary. Polygamy is the engine that drives Islamic expansion in fact. Older high status males hoard young available females causing a scarcity of available females among younger and middle and lower class males. Which is a perpetual state leading to high numbers of incels fighting with each other (they too are the decendents of rapey violent polygamists). Islam sublimates this problem by sending angry incels off to fight jihad in foreign lands and take as many females as they please there. They are promised women even if they die which is exactly what angry incels want to hear. After so many generations of islam and polygamy, the males in conquered societies become more stupid and violent than they were before patriarchal polygamy. Christianity forces men to be monogamists which means they will compete by proving they will be a high quality dad through economically useful skills and being a non-psycho. Monogamist focus more on being productive to win the highest value female and by impressing her with their “personality”. Muslim polygamists just buy their wives. Is christianity responsible for white guys being nice? Or is it monogamy? https://henrich.fas.harvard.edu/files/henrich/files/henrich_boyd_richerson_2012.pdf