To guide policymaking, decision makers require a good understanding of the long-term drivers of food
security and their interactions. Scenario analysis is widely considered as the appropriate tool to assess
complex and uncertain problems, such as food security. This paper describes the development process,
storylines and drivers of four new global scenarios up to the year 2050 that are specifically designed for
food security modelling. To ensure the relevance, credibility and legitimacy of the scenarios a highly
participatory process is used, involving a diverse group of stakeholders. A novel approach is introduced to
quantify a selection of key drivers that directly can be used as input in global integrated assessment models
to assess the impact of aid, trade, agricultural and science policies on global food and nutrition security