Earlier quoted context omitted.
A lot of this largely is not true. People think that paleothic humans ate a lot of meat - they did not. They ate very little meat, we eat the most meat we’ve ever eaten now. And the meat they did eat was lean game meat. It was high in unsaturated fats - like our modern day oils. Not like a steak. A steak is a product of farming. It’s a new invention, Yes oils are “refined”, but humans have been eating unsaturated oil…
People in certain regions always ate a lot of meat. For example, the Inuit don't really have anything else to eat. Nothing edible grows that far North. And they are neither obese nor suffer from classical diseases of civilization, until they start eating highly processed modern food. The Maasai are also known to eat a lot of meat and dairy.
But, humans have been eating unsaturated fat from nuts, seeds, and meat for millennia. Unsaturated fat is not the devil. We have very strong evidence that a diet high in meat, particularly farmed red meat, is both carcinogenic and causes heart disease. When you look at high processed diets across the globe today, you'll notice they have similarities:
1. Extreme consumption of fatty, farmed meats
2. Very little fruits, vegetables, nuts, and other foods high in fiber
3. Processed shelf-stable goods
4. Extreme portion sizes
When people look at the Mediterranean diet, it's not just that they eat much more food high in unsaturated fat as opposed to saturated fat. They also eat less and move much more.