There was a good talk at Carnivore Con in 2019 here (https://www.youtube.com/watch?v=jH7JGM7K-Lc&list=PLluvR68gTTv-eVg8Q7McC8maqIwcuRCbI&index=5&t=0s https://ww

There was a good talk at Carnivore Con in 2019 here (https://www.youtube.com/watch?v=jH7JGM7K-Lc&list=PLluvR68gTTv-eVg8Q7McC8maqIwcuRCbI&index=5&t=0s https://www.youtube.com/watch?v=jH7JGM7K-Lc&list=PLluvR68gTT...) about this. The very rough gist is that there is historical evidence of pre agrarian humans starving to death with stomachs full of lean meat. In a nomadic lifestyle where they chase down prey protein costs too much energy to digest and convert into usable energy.