We are living in an era of accelerating social and environmental change, one that calls for greater change-ability: skilled ways of coordinating with a rapidly changing world. Yet people and the communities they form often find change hard to realise and sustain in their lives. This project aims to open up a new perspective on change-ability, starting from the insight that what people do is both enabled and constrained by the affordances of their surroundings. Affordances are possibilities for action provided by the living environment. Every activity from sitting in a chair to making architecture is enabled by affordances. Less recognised is the fact that affordances also constrain people’s ability to change what they do. Even when people know that excessive sitting is unhealthy, offices filled with desks and chairs make them less inclined to explore other possibilities. We will create a conceptual framework for understanding change-ability in affordance-based terms that spans different scales: from the dynamics of active individuals, to communities and the living environment. The framework will be applied to learn about obstacles to change in communities and how affordance-based architectural interventions can reduce such impediments. Our philosophical method is unique in integrating findings from diverse scientific and artistic disciplines. We will participate in and reflect on the making of architectural interventions that allow visitors to experience what it would be like to live in entirely different ways. This will be done at RAAAF, an internationally renowned, award-winning studio for experimental architecture I co-founded. We will break new ground by showing how affordance-based interventions in the living environment can increase openness to exploring unconventional possibilities that could spark collective behavioural change. By scaling from change-able individuals to communities, we seek lessons for how to break down obstacles to collective change at a time when it is urgently needed.