I am sure many people have. But if not look up Ancel Keys and the 7, should have been 22, country study. And the lipid hypothesis. Makes me want to cry literally.
And how John Yudkin's work was buried. His book has been reissued BTW. I bought Kindle edition but haven't read it yet. Diet, Hunger, and Power of Crowds has a cool summary.
I heard someone say if you look at USDA pyramid it is a commodity pyramid. All the things AG needed to sell the most of they told us to eat the most of