Kate Raworth's “Doughnut” model is gaining traction as a key framework to understand sustainability context. Building on the planetary boundaries framework as a 'ceiling', it adds social foundations as a 'floor' and underlines the need to operate in the space between. The social foundation is made up of 11 boundaries that draw attention to communities needing access to basic resources to fulfill their human needs. This access needs to be achieved in a way that does not place undue stress on the earth's resources. The framework is based on the premise that we should be striving to build and maintain social foundations while staying within planetary boundaries.