If everyone lived the global middle class lifestyle of London or Shanghai it would require three planets to support us. And yet the average citizen of Bangladesh consumes the equivalent of just a third of a planet. What is needed is one planet living where people can live happy healthy lives within a fair share of the world’s resources having left sufficient space for wildlife and wilderness. Sustainable communities and businesses around the world show how one planet living is attractive and achievable. A simple approach and framework makes it easy to deliver it. This paper proposes that world leaders make a statement that recognises the planetary boundaries in a world with a large, growing human population and commit to take action through a multilateral framework to enable the world to define and deliver a safe operating space within the timeframe that science and morality deems necessary. Key components of this multilateral framework would include Global and National Roadmaps to enable citizens to achieve one planet living supported by a new “Intergovernmental Panel on Resources”, a peer reviewed “Solutions Bank” and a raft of policy solutions to support the transition to a one planet living with a fair and green economy.