More than 49 million Americans-or one in seven-struggled to find enough to eat last year, according to a report from the US Department of Agriculture released Monday. That’s the highest total since the federal government began keeping track of food insecurity. Meanwhile, leaders from most of the world are gathered in Rome to tackle hunger on a global scale at the UN World Food Summit, but leaders of the world’s richest countries were largely absent from the summit. We speak with Raj Patel, author of Stuffed and Starved: Markets, Power and the Hidden Battle for the World’s Food System.