First you seem reasonable and intelligent. That's refreshing. Congratulations I am also reasonable and intelligent. Lets see if we can have a spirited discussion on this issue. :)
As to people eating fewer carbohydrates way back when... you do realize that the modern world was built by carbohydrates?
Wheat, Rice, Maze, Potatoes, even Poi (Polynesians liked this stuff on their little island paradises... completely gross. Like eating paste.)... no major culture rose without a staple crop.
So your argument is that past generations didn't eat so many carbs? The Egyptians were huge fans of it. They drank a thick beer like drink as the energy drink of the ancient world. Full of carbs. Were the Egyptians fat?
What about the Romans? One of the big things the Romans offered anyone that lived in Rome was free flour. And they offered because Egypt's tribute to Rome was regular shipments of wheat. That wheat was then ground into flour in huge water powered flour mills in the heart of Rome. Water from the aqueducts was run through water wheels to turn mill stones to turn out huge amounts of flour. This flour was given to the people at no cost as a kind of ancient welfare. As you'd imagine , the Romans ate a LOT of wheat in any form you can think of because the flour was literally free to the common people.
Were the ancient Roman's fat? They'd have to have been because they were consuming a lot of simple carbs. No?
As to your reading... All of that just sounds like you've made up your mind. Can we have a discussion for the sake of argument? Is it possible for me to propose alternative theories and have them be listened to with an open mind?
You tell me. What sort of evidence would you like to see?
The biggest problem I have with modern statistics is that they conflate entirely different lifestyles and suggest that the only change was diet. This ignores changes in exercise etc.
As to heart disease etc... I question the accuracy of statistics going back in time. What is more the human body rapidly starts having all sorts of problems after the prime mating and reproductive phase in the life cycle. Pass the 30s or so and everything starts to have problems because evolution stops caring about you. You're just running on inertia at that point.
And to that point, there are some people that can eat cheeseburgers every day and smoke a pack of cigarettes and be very healthy into their 90s. This has been studied. And their DNA has been studied. What they found was that people that seem to be able to do this don't have any one special gene but rather they don't have a lot of genes which generally make us unhealthy. Most people have some of those genes but some people have none of them. Those with literally none of them can abuse their bodies horribly and suffer no consequences from it.
This is the 21st century... this is slashdot... Yes, I am suggesting the genetic engineering diet. Fuck GMO food, I want to GMO me.