Victoria J. Marsick, Professor of Adult Learning and Leadership at Columbia University, helped establish transformative learning theory alongside Jack Mezirow. The theory describes how adults change not just what they know but how they know: transformation is triggered when experience cannot fit within existing frames of reference, forcing either rejection or fundamental reframing. Critical reflection on unconscious assumptions enables this shift; rational discourse with others provides the mechanism for arriving at more inclusive, dependable understanding. These elements connect directly to dialogue practice, which similarly emphasises surfacing assumptions and thinking together. In this participative webinar, Marsick brings decades of research on informal learning, action learning, and adult development to explore what dialogue practitioners can learn from transformative learning theory. Her extensive work at UNICEF and with organisations worldwide grounds the theory in practical application, showing how adults actually change through sustained encounter with difference.