Modern agriculture and food systems, including organic agriculture, are undergoing a technological and structural modernization and are faced with a growing globalization. Organic agriculture (OA) can be seen as pioneering efforts to create sustainable development based on other principles than mainstream agriculture. There are however large differences between the challenges connected to, on one hand, modern farming and consumption in high-income countries and, on the other, smallholder farmers and resource poor consumers in low-income countries. The point of departure is the increasing globalization and the production and trade of food and fodder and how this influences the role of OA. This book provides an overview of the potential role and challenges of organic agriculture in this global perspective, as seen from different perspectives such as sustainability, food security and fair trade.