In the northern hemisphere, only meat could sustain humans through winter. The cold also kept the meat better longer. I have to imagine that over a few hundred

In the northern hemisphere, only meat could sustain humans through winter. The cold also kept the meat better longer. I have to imagine that over a few hundred thousand years the savannah changed as well as the world as a whole. We are probably adapted based on our genetics rather substantially to particular diets. I can imagine gathering berries and honey would be more common in temperate or tropical climates. But in the colder climates milk, cheese, eggs and meat had to be a larger percentage of the diet.