Tensions between the well-being of present humans, future humans, and nonhuman nature manifest in social protests and political and academic debates over the future of Earth. The increasing consumption of natural resources no longer increases, let alone equalises, human well-being, but has led to the current ecological crisis. While the crisis has been acknowledged, it is often approached in human-centred terms, with framings that limit the moral worth of nonhuman nature to its contribution to human well-being. We derive and propose the concept of planetary well-being to recognise the moral considerability of both human and nonhuman well-being, and to promote transdisciplinary, cross-cultural discourse for addressing ecological and social crises and for promoting societal and cultural transformation. Conceptually, we shift focus in well-being from individuals to Earth system and ecosystem processes that underlie all well-being. Planetary well-being is a state where the integrity of Earth system and ecosystem processes remains unimpaired to a degree that species and populations can persist to the future and organisms have the opportunity to achieve well-being. After grounding and introducing planetary well-being, we shortly discuss how it can be measured and reflect upon its potential as a bridging concept between different worldviews
