1. An Introduction to the Complex Construct of Wellbeing, Societal Challenges and Potential Solutions2. Shifting the Paradigm of Positive Psychology: Toward an Existential Positive Psychology of Wellbeing3. Beyond Us: Building Collective Wellbeing4. Towards a Culture of Care for Societal Wellbeing: A Perspective from the Healthcare Sector5. ACTing for Society: The Promotion and Nurturance of Prosocial Behaviour at Scale6. The Relationship Between Nature Connectedness and Human and Planetary Wellbeing: Implications for Promoting Wellbeing, Tackling Anthropogenic Climate Change and Overcoming Biodiversity Loss7. A Modern Framework of Wellbeing from the Perspective of Positive Environments8. A Public Health Perspective on Wellbeing9. The Economics of Individual Wellbeing and the Transformation of Society10. Social and Material Foundations of Wellbeing: Beyond the Neoliberal Model of Development11. Discussion: Broadening the Scope of Wellbeing Science