Externe Publikationen

No time for lamentation: a new agenda for cooperation (Chair's summary of the Hamburg Sustainability Conference 2026)

Steiner, Achim
Externe Publikationen (2026)

Summary report by Achim Steiner, Chair of the Hamburg Sustainability Conference, in cooperation with Axel Berger, Franco Jauregui-Fung and Lena-Marie Putz, German Institute of Development and Sustainability (IDOS)

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The Hamburg Sustainability Conference (HSC) 2026 convened around 1,600 participants from 112 countries at a moment of profound disruption and redistribution of power. The HSC confirmed sustainability as the organizing framework linking peace and stability, economic
resilience and competitiveness, planetary boundaries and international cooperation. The rules-based international order is under pressure, fiscal space is shrinking and conflicts are multiplying, while climate change, biodiversity loss and resource depletion are compounding
these pressures on economies and societies already stretched thin. Yet the world has never possessed greater technological capabilities, financial wealth and scientific knowledge. What matters now is how we use these resources to deliver shared prosperity and resilience.
The discussions at HSC 2026 can be summarized along three narrative arcs. The first asks why cooperation remains essential in a more multipolar world. Legitimacy depends on changing the terms of North–South relations, broadening representation and building a cooperative multipolar order in which a wider group of actors can shape and defend common rules. The launch of the South–North Commission on Development offers a structured process for rethinking international cooperation toward fairer partnerships and a  sustainability Agenda beyond 2030. The second narrative arc examines what needs to change. Sustainability transformation pays
off economically, but only where investment can flow, risks are shared and governance is predictable. Nature and human capital are systematically undervalued. The bottleneck is the institutional and financing structures needed to unlock them at scale. The third narrative arc addresses how cooperation can deliver. It shows that partnerships accelerate sustainable development when they move from one-off initiatives to systems that mobilize finance, create markets and build local capabilities. Scaling Capital for Sustainable Development (SCALED), Innovative Capital Mobilization in Africa (ICAMA), critical-mineral and hydrogen partnerships, and urban examples from Mombasa and eThekwini show how tangible forms of cooperation can turn commitments into sustainable investment, deeper value chains and locally owned action. This shift is especially visible in Africa, where partnerships are increasingly framed around opportunity, value creation and agency. The road ahead runs through the Triple COP+ year, the G20 under UK chairmanship, and the SDG Summit in September 2027. HSC 2026 demonstrated that navigating the new - disruptive - normal is possible. The task now is to prove it at scale. […]