This article explores the accelerating loss of human connection to nature and why it matters – not only for the environment, but for health, culture and the future of cities. Drawing on recent research, it shows how nature disconnection has become a systemic risk, and outlines practical pathways to reverse it: through culture and storytelling, childhood education, nature-based solutions, urban design and health policy. The piece frames nature not as an amenity, but as essential infrastructure – central to wellbeing, resilience and long-term societal stability.