One important note, Chris: The soy consumption by Okinawans was mostly fermented soy and has not traditionally been GMO soy either. Which brings up another notable result of people changing their tradtional diet. Until the introduction of soy into their diet, the people of northern Africa has very little incidence of stomach cancers. Since the introduction of soy, the stomach cancer rates have sky-rocketed.
This is a questionable statement. Studies are very conflicting on this and as they point out in this meta analysis soy contains various anticancer agents:
Furthermore, the primary cause of stomach cancer is H. pylori, which is believed to be spread by flies. Proper food storage such as refrigeration is a luxury in many parts of Africa and flies are frequently all over the food potentially spreading H. pylori. Add to that other factors such as the stressful lifestyle, malnutrition, and other immune suppressing factors and we have the perfect storm for increased stomach cancer rates.
Its easy to blame soy, which is why it is blamed so often for things it has nothing to do with. But proving those claims is a much different story, especially when the evidence to the claims does not exist. For example I had a naturopathic doctor actually tell me that the reason Asian people are so short is because the soy they consume stunts their growth!!! I was given soy milk as an infant since I was allergic to both mother's milk and cow's milk. And I have continued to consume soy ever since. Yet I am 6' 2". I guess it was a good thing that the soy stunted my growth otherwise I would have been a giant!!! By the way I am extremely healthy, am not brain damaged or gay either as the anti-soy proponents also claim these are side effects of soy consumption. I really wish people would rely on real science and some common sense instead of anti-soy propaganda sites for their information.