The document discusses the changes in global food systems over recent decades that have led to a two-tiered system of food access. In northern countries, supermarkets and global food imports have increased access to healthy and unhealthy imported foods. Meanwhile, southern countries have faced debt crises and pressure to export cash crops, replacing local production and leading to diets higher in fats, sugars, and processed foods. This nutrition transition poses public health risks. The document questions whether the northern diet model is appropriate globally and examines alternative agricultural and food systems.