Narratives outlining broad characteristics of the global future and country-level population, Gross Domestic Product (GDP), urbanisation projections based on five alternative socio- economic developments (i.e. sustainable development), regional rivalry, inequality, fossil-fuelled development, and middle-of-the- road development. The SSPs are supported by key quantitative indicators and metrics, describing trends in demographics, human development, economy and lifestyle, policies and institutions, technology, environment and natural resources.