juicy wrote:
I think this is a big question, and has some varied answers.
Indeed, which is why I am trying to discover as many as I can to decipher this dreadful puzzle.

Ties to womens liberation? Curious. Did they see fat as too... too much of something that a man would want, and that a skinnier figure was a form of rebellion, perhaps? Economic trends...
katsujinken provided an explanation for that which makes clear sense.

Moonchild wrote:Another thing is that people don't like to think too much, so they like to have standards, even for things that are not intrinsically good or bad. A spot is picked on the fat/thin spectrum and everything else is wrong. See also: fashion, music, etc.
I don't think this is a recent hatred, I think it's just the redirection of the same archaic hatred that we've allowed to consume us for centuries.
Those are very interesting points. Humans like to keep things simple, and it seems humans always need something to hate. We outlasted predators, and now we turn on each other.
I was looking as to a reason why the hatred seems almost instinctual... I think the answer is that humans, especially when young, are capable of absorbing more off society than they normally aware of. Society subtly tells people of all ages that fat is wrong and they integrate that feeling into themselves without really noticing that they've effectively been brainwashed. Similar things happen in different societies, but the subtle social brainwashing infects every single culture. Which is why... different cultures think so differently regarding instincts, an example being of how different cultures find certain appearances attractive. =o