From 2011 to 2016, the South Asia Champions Dialogue Process brought together senior leaders from all eight South Asian countries for off-the-record conversations about regional cooperation. The results were unprecedented: the first India-Pakistan energy transmission line, expanded trade through river dredging between India and Bangladesh, and the defusing of an India-Nepal border conflict. William Isaacs, who facilitated this World Bank and DFID-sponsored process, explains how it succeeded where thirty years of summits and institutional efforts had failed. The key was creating what Buckminster Fuller called a 'trim tab': a small intervention that shifts a larger system by working at the right leverage point. The paper candidly addresses challenges: managing historic animosities between nations, navigating Pakistani concerns about Indian dominance, and the realisation that teaching dialogue didactically would have failed instantly. People learned by experiencing dialogue in action together.