You are somewhat correct on the Calorie issue...Consumption of Calories and Fat has dropped significantly since the 50s/60s. The LF Zealots like to claim that Calorie and Fat intake are up by comparing current intakes to those in the mid-80s, when the LF Fad was at its peak. Calorie and Fat intake has REBOUNDED slightly since their lowest point in the 80s, but are still significantly lower than they were for the first 70 years of this century.

What is noteworthy is that CARBOHYDRATE Consumption, especially refined carbs (Sugar and White Flour) is up significantly compared to the first half of the century, despite the fact we are eating less Calories than we were then. We are eating less overall, but more Carbs...especially Sugar and White Flour, and Obesity is running rampant.