Ive traveled around the world, central/south America, Europe mostly, and I noticed there were almost no obese people at all.
I don't know, in Europe it is becoming an increasing problem as well. My generation as children (I am now in my twenties) were raised as seeing American society as the way to be.
Another thing is that, sadly, the fatty fried foods are on the up because people are getting poorer (because of a reasonably sized economy crash and a lack of money moving around) and the prices of greens are higher than the prices for pre-cooked dishes that usually contain a lot of fat, sugar and preservatives to make them appealing.
Because people have to work hard, they can't be arsed to cook for themselves and either have no time or no finances to cook a full healthy meal for their family. This means that especially in the poorer neighbourhoods obesity levels are rising.
Poor people also have no access to sports facilities or recreation. Therefore any weight they gain will stand little chance of ever being lost.
The problem is not so much with adults, or adolescents of my generation, the problem is mainly being seen in child obesity.
The uk and the netherlands have both started nationwide programs to inform people of the health risks of eating this type of food. the problem is that this will never do any good if you don't create a situation in which people have the time or the finances to eat healthily.
Basically if you want to put it cynically, you could say that when being bigger was fashionable was fashionable the poor were skinny and now being skinny is fashionable, the poor are fat.
On the feminist perspective on weight, I don't really know what to say.
I think that historically because of biology and attraction and all that, fashion has always been an issue, from the dawn of time some things have been found pretty and others weren't. If you read 1984 you find a society in which all sexuality and all "fashion" (read as things that are found pretty not things of commercial interest) have been ripped out of society. I don't like that type of society, I don't think it is a bad thing for a woman or a man to dress up or make up to make themselves look prettier once in a while. However when it takes on unhealthy extremes I do start to worry.
I kind of see obesity and anorexia as products of modern society, like the chicken, who, when amongst too many of their peers, start tearing each other apart, because we are unhappy about so many things subconsciously that we cant control, we start trying to control the things we can with as a side effect that these things get completely out of hand.