Yet despite all of the moral connotations ascribed to weight gain, we have little idea exactly why people weigh somewhat more now than they did a generation ago….

So what if the so-called ‘obesity epidemic’ is largely an illusion? What if higher than average weight turns out to have neither much medical nor moral significance? The answer to these questions, all of which we believe are strongly suggested by the epidemiological literature, go far beyond the issues of body mass and health. The current scientific evidence should prompt health professionals and policy makers to consider whether it makes sense to treat body weight as a barometer of public health. It should also make us pause to consider how propagating the idea of an ‘obesity epidemic’ furthers the political and economic interests of certain groups, while doing immense damage to those whom it blames and stigmatizes.