During eleven years as Leader of Northern Ireland's Alliance Party, six years as Speaker of the NI Assembly, seven years as an independent monitoring commissioner and since then in various conflicts involving non-state actors around the world, John, Lord Alderdice has explored how to understand and engage with groups involved in politically-motivated violence.  In this session he will talk about the importance of understanding 'large group psychology', the significance of leadership, and the development of negotiation and implementation in peace processes.