CID Research Fellow Tim McNaught interviews Duncan Green, Oxfam Strategic Adviser and LSE Professor of International Development on his latest book, "How Change Happens". Recorded on December 7th, 2016. "How Change Happens" explores how political and social change takes place, and the role of individuals and organizations in influencing that change. In the book, Duncan discusses the challenges that ‘systems thinking’ creates for traditional activism and aid, and how a ‘power and systems approach’ requires activists, whether in campaigns, companies or governments, to fundamentally rethink the way they understand the world and try to influence it.