Something else I've read (Michael Pollan's In Defence of Food) is that diets are connected to the culture they are in as well. So taking an Inuit diet and movin

Something else I've read (Michael Pollan's In Defence of Food) is that diets are connected to the culture they are in as well. So taking an Inuit diet and moving it to Spain would indeed not work, but then taking a diet that works in Spain and moving it to the Arctic won't work either. The food you eat is balanced out by what your daily activities are and vice versa. To that end the modern Western diet does not work well with a modern Western lifestyle, which leads to problems.