This seems to be (trivially?) true, but your post appears to be about obesity and your graph doesn't necessarily show anything about that. The increased food energy consumption could be due to reduced malnutrition / starvation or changed age structure (adolescents and working adults eating more than children and seniors).
Graph only illustrates it, it's not a definite proof, but the thesis is correct. Issues like malnutrition, age structure etc. are secondary at best - massive over-eating is a well established fact.
Recommended daily calorie intake is 2000 for women and 2500 for men - which also happens to be the level world average had in 1960; and as some people were malnourished, other must have been overeating already.
Consumption kept growing in all countries including those far past this level - for example FAO says average for Americans increased 1961-2005 from 2884 to 3855 kcal/day (and is world's highest).
As I said I haven't read much about the topic, but it seems to me that including these sorts of points in the original post rather than just the naked graph would have been better, particularly on a site like less wrong.
Related to: Babies and Bunnies: A Caution About Evo-Psych, Superstimuli and the Collapse of Western Civilization.
The main proximate cause of increase in human weight over the last few decades is over-eating - other factors like decreased energy need due to less active lifestyle seem at best secondary if relevant at all. The big question is what misregulates homeostatic system controlling food intake towards higher calorie consumption?
The most common accepted answer is some sort of superstimulus theory - modern food is so tasty people find it irresistible. This seems backwards to me in its basic assumption - almost any "traditional" food seems to taste better than almost any "modern" food.
It is as easy to construct the opposite theory of tastiness set point - tastiness is some estimate of nutritional value of food - more nutritious food should taste better than less nutritious food. So according to the theory - if you eat very tasty food, your appetite thinks it's highly nutritious, and demands less of it; and if you eat bland tasteless food - your appetite underestimates its nutritious content and demands too much of it.
It's not even obvious that your appetite is "wrong" - if you need certain amount of nutritionally balanced food, and all you can gets is nutritionally balanced food with a lot of added sugar - the best thing is eating more and getting all the micro-nutrients needed in spite of excess calories. Maybe it is not confused at all, just doing its best in a bad situation, and prioritizes evolutionarily common threat of too little micronutrients over evolutionarily less common threat of excess calories.
As some extra evidence - it's a fact that poor people with narrower choice of food are more obese than rich people with wider choice of food. If everyone buys the tastier food they can afford, superstimulus theory says rich should be more obese, setpoint theory says poor should be more obese.
Is there any way in which setpoint theory is more wrong than superstimulus theory?