hmm, i suspect it's not only the indigenous people who are affected like this. if we consider how western diets and lifestyles have changed over the last 70 years or so - far more sugar in the diet, far less exercise, i.e. far less manual labour, loads of labour-saving appliances, relatively easy access to transport - there is much greater disparity between what/how much food our bodies need to stay healthy and what we actually eat - so it's not really surprising that there are so many of us now with diabetes. maybe it's just that all human beings need to not eat too much, do a reasonable amount of exercise and have a high ratio of protein to carbs in their diet. and in our modern society, poverty definitely has something to do with it - even in an affluent country like the UK, it is pretty difficult to eat a healthy low-carb diet if you're living on a shoestring - those avocados and olives don't come cheap!