The hidden truth behind Ancel Keys’ famous fat graph

For a while, in the middle of the last century, there was a scientific struggle. Was fat or sugar to blame for cardiovascular disease? Ancel Keys was the champion of the first theory; Professor John Yudkin of the other. Keys won, but not all of the data he used to make his arguments was a fair representation of reality.
The left graph above was famously used sixty years ago by Keys, to support his idea that fat intake was responsible for heart disease. But as the right graph shows, the same data could just as easily have implicated sugar. Countries eating higher amounts of fat were simultaneously eating more sugar. It was just a question of what you were looking for.
Since that time, we’ve spent half a century fearing natural fat, and instead eating more carbs. At the same time, an epidemic of obesity and diabetes has occurred. Even though the association in the graph on the right can’t show cause-and-effect anymore than the graph on the left, it may be time to reconsider: maybe Yudkin was right.
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As to the graph on the right, it's data from 1969, not from 1953. And by the way, why are we waving this graph around like its some kind of victory for fat? Look at the data points; fat correlates better than sugar for CVD. So correlation doesn't equal causation except when it satisfies your biases?
Fortunately we have dozens of high-quality RCT studies these days:
https://www.dietdoctor.com/low-carb/science
Also, how come the death rates continued to decline even as intakes of sugar, high fructose corn syrup, etc. skyrocketed in the 70s, 80s, 90s? Obesity rates also increased at this time of falling heart disease mortality. Far more complex than anyone wants to admit, because there are just no easy answers.
People knew the issues were complex.