quite the opposite diet can be claimed by the inuit. more, the most powerful civilization in the world, the US, has objectively one of the worst diets in history.
The diets in the US have gotten worse in recent decades (way more processed foods especially) and the US is objectively facing the ramifications of those diets. That doesn't make them any less powerful but this discussion was actually about health and I think in this regard it paints a clear picture that this is not the way to go.