What do the 2015 SDG negotiations teach us for a beyond-2030 framework?

The 2030 Agenda for Sustainable Development - the global framework establishing 17 universal and interconnected goals to guide sustainable development efforts - was adopted in 2015 following a uniquely participative and ambitious process. A decade on, it is increasingly evident that most of the Sustainable Development Goals (SDGs) are unlikely to be achieved by 2030 as originally envisioned. Discussions about a follow-up framework beyond 2030 are gaining momentum ahead of the SDG Summit in September 2027. This paper evaluates the process design, inclusiveness, negotiating strategies, fora and fault lines in 2015 and discusses to what extent the lessons learned can be applied to negotiations for a potential follow-up framework. We find that several process design elements and negotiation strategies, as well as actor composition, fostered trust and ownership, reduced polarisation and enabled agreements on ambitious targets. In particular, the process benefited from the inclusion of diverse, non-hierarchical actor communities, a long, science-based stocktaking phase, the breaking up of traditional negotiating blocks, transparency, and emphasis on common interests. We also identify several recurring fault lines that are overwhelmingly still relevant today. Apart from the above best practices of the process leading to the adoption of the SDGs in 2015, we identify several shortcomings that should be addressed in the beyond-2030 negotiations: inefficiencies due to competing tracks for the development of the goals; top-down agenda-setting processes leading to less ambitious outcomes; barriers to participation of and accountability towards some marginalised and informal actors; and the watering down of goals and indicators - including non-tangible targets and unresolved inconsistencies and trade-offs within the agenda. Finally, the paper argues that the beyond-2030 negotiations will take place in a context that is similar to the process that led to the SDGs but is nevertheless in many ways more challenging than in 2015, amidst intensifying crises, political shifts and loss of trust.