It brought together more than 500 participants from 50 countries – delegations from states and governments, international institutions, local authorities, foundations, cooperatives and actors of the Social Solidarity Economy (SSE), companies, accelerator networks and social entrepreneurs – all committed to meeting the major challenges of our century. It mobilised nearly 70 experts from around the world, key witnesses of the inspiring social and environmental innovations of recent years that aim to achieve the Sustainable Development Goals.