The world is having actually opposite problem, which is increasing obesity. In developing world, it reaches dangerous proportions and often the poorest states on this planet suffer with the highest level of morbid obesity. While many are aware of obesity rate in USA, UK, Germany, it is actually far worse in Mexico, Bolivia, Paraguay, Venezuela, but also in Africa and Middle East. (Mali, Mauritania, Egypt, Kuwait, Saudi Arabia). In these countries people have as twice as much of caloric intake than industrial countries of the North. One main issue for the rise of obesity is a consumption of sugar, which became extremely cheap in past 25-35 years.
Famine would return only if there is a catastrophic weather change world-wide, which would disrupt supplies everywhere. Today there is no problem to import fruits from Chile, vegetables from Spain, grain from USA and butter from Denmark anywhere in the world in case of localized food supply collapse.