There are numerous things that can cause eating disorders in my opinion and its far too simplisitic to suggest that one of these factors alone could cause such a diverse and complex illness. You can't blame society, because there have been cases of anorexia for centuries, despite society then favouring a diffrent type of female. And you can't blame the person because, well, i don't suppose they asked to be who they were, or asked to have an eating disorder...they are made who they are, as are the eating dosorders, by a combination of societal pressures, insecurities brought on by up bringing, experiences at school, work, of abuse etc...and even things such as genes have been implicated in eating disorders.

I don;t think anyone other than those who have lived through an eating disorder can truely understand what caused it.