we know that through history, as a rule, humans had much more fibrous meals. Study after study points to the diversity of Paleolithic diets. An investigation of a 23,000-year-old site in Israel uncovered that the local cuisine included more than 142 different species of plants (including seeds, nuts, fruits, and cereals).
What Your Microbiome Really Needs Is Fiber, Not Kombucha
Katherine Harmon Courage

Curious. Why, then, do people who “eat Paleo” eat so much meat? And Keto dieters so much meat and oil?