In the face of escalating global sustainability challenges, ranging from extreme weather events to the sixth mass extinction and the increased exploitation of more-than-human beings, the limitations of anthropocentrism have become stark. Our planet shakes on the edge of ecological collapse, underscoring the need for innovative frameworks that extend beyond human interests to encompass the intricate web of life that sustains us all. It is within this context that posthuman imaginaries constitute a critical alternative to hegemonic imaginaries of sustainability. The ‘Posthumanism for Sustainability’ (PH4S) project (https://www.posthumanlab.org/project-ph4s) is aimed at providing a knowledge base and digital repository that can further expand discussions around posthumanist sustainability. In this short essay, I would like to present the objective and main findings of this project, as well as discuss its potential implications for the study of science and belief in society. Sustainability is commonly understood as a paradigm for thinking through future challenges,