Obesity is now at pandemic levels. Its prevalence is increasing in almost all countries-developed and developing (1). To curtail and eventually reverse the rise in obesity prevalence rates, a broad, population-based approach will be needed (l,2). The majority of the current global effort on obesity, however, is centered around establishing biological mechanisms related to energy imbalance and finding appropriate methods of treatment for individuals with obesity. The move to tackling whole populations with obesity requires conceptual shifts at many levels.