Contributor(s): Ellen Barry, Khalid Janahi, Ngozi Okonjo-Iweala, Professor Lord Stern, Professor Andres Velasco | Global challenges discussions around the Hard Truths exhibition (democracy, disinformation, migration, drug trafficking, climate change, global extremism). What global leadership and governance reforms are needed? Ellen Barry (@EllenBarryNYT) is a London-based international correspondent for The New York Times, covering immigration, security, demographics and culture across Europe. Khalid Janahi is the former Chair of Ihtmaar Bank, a Bahrain-based investment bank with a global portfolio. He was the co-founder of the Arab Business Forum at the World Economic Forum. Ngozi Okonjo-Iweala (@NOIweala) was Nigeria's Minister of Finance from 2003 to 2006 and from 2011 to 2015, and Foreign Minister in 2006. She was Managing Director of the World Bank from 2007 to 2011, overseeing South Asia, Europe, Central Asia, and Africa, and is currently Senior Adviser at Lazard and Board Chair of Gavi, the Vaccine Alliance. She is the author of Reforming the Unreformable: Lessons from Nigeria. Her lastest book is Fighting Corruption Is Dangerous: The Story Behind the Headlines. Nicholas Stern (@lordstern1) is the IG Patel Professor of Economics and Government and Chairman of the Grantham Research Institute on Climate Change and the Environment. Andrés Velasco (@AndresVelasco) is the inaugural Dean of the new School of Public Policy at LSE. He was the Minister of Finance in Chile between 2006 and 2010 and held professorial roles at the Harvard Kennedy School and Columbia University´s School of International and Public Affairs. Erik Berglof (@ErikBerglof) is the inaugural Director of the Institute of Global Affairs (IGA) on 1 February 2015 and Professor in Practice in the Department of Economics. This event is one of a series of public events linked to the Hard Truths exhibition which will be on display at LSE from 1-26 October. The Institute of Global Affairs (@LSEIGA) aims to maximise the impact of LSE's leading expertise across the social sciences by shaping inclusive and locally-rooted responses to the most important and pressing global challenges.