Humanity’s challenge in the 21st century is global – to eradicate poverty and achieve prosperity for all within the means of the planet’s limited natural resources. Economist Kate Raworth presents a visual framework – shaped like a doughnut. This model brings planetary boundaries (such as healthy climate, biodiversity, limited land, and freshwater) together with social boundaries (such as necessary levels of food and water availability, adequate jobs and income, health, and education) to create a safe and just space in which humanity can thrive and the planet survive. To move into this space demands far greater fairness – within and between countries – in the use of natural resources, and far greater efficiency to transform those limited resources to meet human needs than at present.