As a fellow red meat lover and eater, I do have to disagree with you on this one. There is way more to obesity pandemic than reducing it to “eating grains and seed oils” my friend. Plus, grains were consumed way more pre 1980’s than they are consumed today. A loaf of bread was always present in any dinner table pre-1980, while now is always missing and is mainly covered by a simple question of the host “does anyone like some bread?”. The main thing has to be lack of physical activity and way less adverse living conditions (i.e. life is very comfy now more so than ever before, think of 100% of housing having constant heat/AC, very few had that in 1960-1970 as an example). Also, an explosion of processed foods, various sweets, artificial colorings and preservative chemicals.
Now, as far as red meat being harmful to one’s health I very much doubt that, as I also doubt your statement that obesity and chronic diseases are a result of grains and seed oils. I’m however in agreement that processed sugar foods are “almost” poison, though they do taste good. As far as is red meat good for longevity I tend to side with the crowd that believes it to be NOT good. without even looking at anything scientific I’d say as a matter of evolutionary theory it has to be not good for longevity. Otherwise, we might as well be the only mammals left in the planet by now, and then we would have turned to cannibalism to satisfy our “red meat satiety” LOL.
No nutrition study can be well controlled and long term in Humans - perhaps outside of totalitarian regimes. So the ask is impossible for almost anything we study in nutrition.
Humans have eaten grains for 1,000s of years so when is the “advent” of grains in our diet.
Evolution is great and all but it only matters until you reproduce. And as mentioned above, beef and lots of meat in general has some benefit for younger people. After your progeny are independent, you are worthless from an evolutionary standpoint. Most people want to live past 50 - and it was probably more like 35 in the majority of human history.
Beef consumption in the US actually peaked in the mid 1970s and wouldn’t you expect CVD maybe 20 years later - and there was lots of CVD in the 1990s. But none of that even matters - because it isn’t well controlled. People ate more processed carbs and had a higher BMI over time which contributes to all bad things.
I understand that people feel like experts “don’t know what they are talking about” because the internet is filled with people who state such things. There are inconsistencies in the literature and differences of opinions among experts. That being said, there are areas of broad general agreement. Excess sugar is bad, processed carbs are bad (and processed meats). Beef is bad (particularly as consumed in the US - ie from industrial grown grain fed cows). Now, saturated fat is an area of nuance and an area of disagreement - even if the AHA makes a definitive statement. That is why there are disagreements on eggs, full fat dairy, coconut oil etc.
Protein consumption ideals are also areas of disagreement. Reality is that it is individual and there are pros and cons and balance.
All these areas of controversy and disagreement don’t negate things we know with very high levels of certainty.
Now, you show me that well controlled study about the dangers of seed oils… (I am certainly not sure of the right answer here).