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The issue of food shows some of the limitations of research into food and weight. We can't effectively discern food and nutrients. When we try to isolate variables in experiments, findings are blurred by the fact that food in daily life is tremendously compounded when eating it. The absorption of milk is very different if you drink it on its own or if you drink it with a steak.

Trying to come up is an effective summary of judgments when it comes to food and weight is extremely difficult in an environment where the food we eat is not representative of what our species has traditionally eaten.

marquisedemerteuil, on your point about Social Darwinism - I am not sure that it would justify genocide. We live in a society of survival of the most powerful, rule by the majority. Our values change only when the majority changes.