Piper S, took me a while, but I finally started making pemmican. Wonderful food, great flavor, when I made it I had prepared myself for a flavor like a meat candle, ie, tallow with dried meat, but it came out more like meat candy. The trick is simple: grass fed beef, ideally, fat rendered keeping it under 250 degrees the whole time, easy with thick bottomed pan and thermoter, as much fat cut from the leanest cuts of beef, dried until crackable, thin strips, then grind in blender to form what looks sort of like beef primaloft, then mix, form into patties or sheets in plastic bags. You can actually see more or less good grass fed beef, the fat on it is white, very white, and renders clear/yellowish, with an excellent flavor. I can think of no better trail food, the cost is about 8-10 a pound if you find reasonably priced grass fed beef, they will usually give you the fat for free, 3 pounds meat makes about 1 pound dried, and fat renders to around half the weight of the starting fat. There's a reason that early American explorers and Indians valued pemmican so highly, it was the best trail food in existence, and probably still is, hard to imagine anything better, dense, calorie rich, great protein, and it tastes great.
I also tried coconut oil based on your comments, virgin, and have to admit, my expectations of good smooth tasting oil was shattered by a sort of gross waxy texture that in fact resembles a coconut candle to my palate, and which almost made me throw up although I did get down a spoonful. Given it cost $6 a pound think I'll stick to either olive oil or rendered fat (have to get cholesterol checked of course to make sure that's ok).
To me, re the ongoing discussion of paleo or whatever else, that's just so complicated, and I wouldn't look for real answers here, just questions that are worth following up if you are interested in such things. One thing is certain,the Inuit did not get diabetes until they started eating our starchy carbs, and their weight was what it needed to be for their climate. I come from farm stock in Norway, and a big chunk of my family has diabetes, so I don't really think there was much adaptation to high carb diets. It's worth noting that potatoes are the worst offenders, and Norwegians love their potatoes, a relatively recent import from South America historically speaking. To me, diabetes is the real answer to what constitutes a healthy diet, if it appears in big numbers in any study group that eats carbs, and not in a low carb group, then you have your answer. Wish the early invaders of South America had been a bit more interested in the cultures and food and health over grabbing the gold and leaving, that's a place you could have seen if there was real adaptation to those fairly starchy diets over time, or if they had the same issues we do. I do know that the South Eastern US tribes that grew corn showed much higher rates of dental decay than tribes who depended more on hunting / gathering, ie, lower carb, and almost no starches.
I was also impressed by Stefansson's writings and views on diet, very interesting stuff. But the range of diets if you just keep it to the Americas and their original native populations is pretty wide, and it's also important to remember that the Inuit eat the contents of the stomachs of the animals they eat, and the livers and all that, in a fresh states, and that's almost impossible to emulate in any non rural setting any longer, even with access to living non agribusiness infected livestock, so as a model it's essentially impossible to duplicate in any town/city setting. Other than the far northern groups, everyone else ate varied diets, that's what 'hunter gatherer' means. But I tend to agree with the logic, there's a huge difference between eating fresh complex foods and heavily modified starches grown with man made chemicals and oil/gas products/byproducts in soil that is really not much more than a glorified hydroponic grow medium. I specifically avoid the term 'genetically modified' because all human developed/optimized grain ever grown is genetically modified (ever seen the first corn 'ears'? tiny things, hard to imagine anyone even seeing something worth maximizing by patient crop selection).
There's more than a little irony in people going out to be in 'nature' then filling their bodies with total industrial generated garbage like sugar powders and 'power bars',, to me that makes zero sense, in any way, I want to be in nature, not outside of it, and that starts with what I eat and drink, ie, what's in my body. Can't be perfect, but nobody needs to be perfect, just a decent try is all that's needed.