Maybe the real culprit in the obesity epidemic is fats, oils, and sugar. It certainly fits the data.
[1] At the beginning of the century, whole wheat flour was uncommon except in rural areas. It spoiled too quickly.
Sugar: The Bitter Truth http://www.youtube.com/watch?v=dBnniua6-oM
There are lots of other articles concerning this, but I felt this was the best one for pure information. He's not alone in discussing this, so I don't have to just take his word for it. But like I said, I'm not a professional in this area.
(By "increase", I mean from 1909-2004. See table 4 of my link.)
Also, FWIW, I have seen the video, and to me the main message was that fructose is bad when fiber consumption is too low.
The problem could be primarily that the Kool-Aid, fruit juice, Tang, soda and Sunny Delight (and other sweet food like sugared-up yogurt and maybe even infant formula) that we've been feeding our kids for the last sixty years has halfway burned out many of their metabolisms while they were still young. It may have nothing to do with wheat. But we can be quite sure that the suspect(s) is a carbohydrate.
If that's so, those folks with a permanently injured insulin response will have a need for an appropriate diet, which may not be like what metabolically-healthy individuals can enjoy. Taubes takes the position that the most effective diets for them are ones which restrict some or all carbohydrates, which is not going to give you clogged arteries like the medical establishment has been saying.
That's about it. There are definitely other places you can go (i.e. the Heart Scan Blog) if you want to see arguments for wheat as a demon of the modern diet. Yet again, that also interacts with the modern insulin resistance that wasn't as much of an issue in the 1920's.
How can we be so sure? The most obvious culprit is total calories. From 1980 to the present, total caloric consumption increased by 500 calories/day (see table 1 of my report). Coincidentally, obesity increased over the same period. But lets ignore that.
Carb consumption decreased, both as a fraction of diet and in absolute numbers. Obesity increased. Taking these two facts together, you need to make a very convincing argument that carbs are really the problem, in spite of the fact that obesity and carb consumption are negatively correlated.
But I don't see where gross carbohydrates are decreasing in Table 1. It seems like they went from 420g in the 80's (from under 400g in the 70's) to 480 or so a decade ago.
[1] http://www.un.org/esa/population/publications/WUP2005/2005wu...
