Very interesting read, especially since I'm a big fan of potatoes. Mostly because I can grow my own and they are a whole, organic food source for my family. I get the part about our ancestors eating mostly meat and fat. I also have read about epigenetics and have a basic understanding and belief in how our parents and grandparents eating has negatively affected our health. So I am thinking about extremely long ago ancestral diet vs dietary changes in just a couple of generations. My thought pattern is this: if epigenetics holds any truth, then evolutionary changes happen relatively quickly. So while it may be true that we evolved over hundreds of thousands of years to eat mostly fat and protein, I believe that we have evolved quickly enough over the past millennia to adequately process other foods such as potatoes, yams, corn, squash, etc. It's the past 40 years or so of GMO foods and processed foods that are doing us in, IMO.