"According to systems thinking, changing the food system — or any other network — requires three things to happen. First, researchers need to identify all the p

"According to systems thinking, changing the food system — or any other network — requires three things to happen. First, researchers need to identify all the players in that system; second, they must work out how they relate to each other; and third, they need to understand and quantify the impact of those relationships on each other and on those outside the system."