Contributor(s): Professor Stephen M Walt | Professor Walt will discuss strategic challenges facing the European Union and explore the geopolitical implications of a weaker Europe for the West. Stephen M Walt (@stephenWalt) is Professor of International Affairs at Harvard University Kennedy School of Government. Peter Trubowitz is Professor of International Relations and Director of the US Centre at the LSE. LSE IDEAS (@LSEIDEAS) is a foreign policy think-tank within LSE's Institute for Global Affairs. The US Centre at LSE (@LSE_US) promotes scholarly analysis and critical debate about the United States.