Obesity has often been thought of as a problem of the developed world, with wealthy countries eating themselves into a state of ill-health with an abundance of ultraprocessed foods, and poorer ones more often suffering from food insecurity. But that’s no longer true. According to a March report from the World Obesity Atlas (WOA), more than half of the global population—51%, or over 4 billion people—will have obesity by 2035, and the condition will touch all regions and continents of the world.