World leaders are gathering in New York for the General Assembly at the United Nations in September 2016 – one year after committing to the historic Sustainable Development Goals (SDGs). The SDG Index by the Bertelsmann Stiftung and the SDSN measures progress towards the goals and shows best practices across countries. Sam George (Bertelsmann Foundation) interviews Jeffrey Sachs (Director, SDSN) during the launch of the SDG Index in New York.