Rob D. van den Berg is Visiting Professor at King’s College London, Honorary Associate at the Institute of Development Studies and a member of the Advisory Council of Wilton Park. His advisory work includes the Climate Investment Funds, IFAD and other international organizations. After a career at the Dutch Ministry of Foreign Affairs, where he was Director of the Evaluation Department, he worked as Evaluation Director of the Global Environment Facility at the World Bank. He was President of IDEAS from 2014 to 2020. Rob has published articles and co-edited books on evaluation issues in the light of sustainable development and the need for transformational change. Penny Hawkins is an independent consultant who works with philanthropic, government and private sector organizations to develop strategic and practical impact measurement systems. Prior to this, she held various evaluation leadership positions, including Head of Evaluation at the UK Department for International Development (DFID), the Rockefeller Foundation and the New Zealand Ministry of Foreign Affairs and Trade. Penny is a former Chair of the OECD-DAC Network on Development Evaluation, past President of the Australian Evaluation Society and is a faculty member for the Oxford Impact Measurement Course, Said Business School, University of Oxford. Nicoletta Stame retired as Professor of Social Policy from Sapienza University of Roma. She has a long experience in evaluation, having been the former President of the Italian Evaluation Association and of the European Evaluation Society. She is associate editor of Evaluation, the International Journal of Theory, Research and Practice, and the vice-president of A Colorni-Hirschman International Institute. Nicoletta has published a number of books and articles on the theories and methods of evaluation. In her teaching and writing she aims at promoting democratic evaluation, as a tool for the improvement of society and politics, and an opportunity for supporting responsible practitioners.