Deglobalisation? The case for diversified and decentralised global sustainability science [Commentary]

As international cooperation on science and sustainability becomes increasingly fragile, sustainability science must evolve to remain effective in a deglobalising world. The traditional, centralised, top-down model of sustainability is proving too vulnerable to current global disruptions, from pandemics to geopolitical conflicts. These challenges threaten progress toward the Sustainable Development Goals and jeopardise decades of collaborative advancement. This commentary argues for a fundamental shift toward a decentralised, community-empowered model of sustainability science. By prioritising local solutions, embracing diverse knowledge systems, and fostering horizontal knowledge exchange, we can create a more resilient and adaptable framework for sustainable development. Key transitions include elevating successful local initiatives, adopting transdisciplinary approaches that include underrepresented knowledge holders, building decentralised knowledge-sharing networks, and recognising that sustainability has different meanings across cultural and geographical contexts. These changes will not only mitigate the fragility of globalised systems but also ensure sustainability efforts are more inclusive, context-sensitive, and grounded in real-world needs. Ultimately, this commentary reimagines sustainability science as a bottom-up endeavour, one that is robust, equitable, and capable of thriving even in an increasingly fragmented global landscape.