Bump.
This is a fascinating thread with very informative links.
And while I am here, I will weigh in on the subject of 'greed'.
In my opinion greed does exist. But the behaviour pattern that people call greed is a craving to fill a void with something. But the craving is emotional, and often the action to fill the need is physical (food, clothes, shopping, alcohol, plastic surgery, work, money...). This means the action will never succeed. How can you fill an emotional emptiness with a potato? Or a bigger house? Or a nose job?
The only way to fill the void is by addressing the emotion.
So it is possible to describe some forms of overeating as 'greed'. If they are aimed at filling such a void.
However, I find that an oversimplification (and an offensive one at that). There are many, many reasons for overeating. Some of them are chemical, some emotional, some habitual, some ingrained through upbringing, culture, lack of education, hormones, exercise levels, disease...
I spent about 20 years in a mire of self loathing and guilt, because I thought I was 'greedy'. Do you know what it was? An endless, un-identified cycle of low blood sugar, followed by reactive out-of-control carb binges, followed by depression, followed by self starvation, followed by hypoglycaemia, followed by carb binges... on, and on, and on... And all that time I had undiagnosed prolactinoma (tumour of the pituitary gland pumping out 10x more prolactin than a lactating woman), plus polycystic ovary syndrome. This lovely combo results in bizarre hormones, extreme food cravings and a cycle of severe hypoglycaemia.
Nowadays if someone blames my overweight on 'greed', I just smile quietly, and console myself with the knowledge that at least I am not the one who has to live with their narrow, judgemental, uninformed mindset.