The Quest for a Theory of Intelligence

R. Gerald Hughes is Reader in Military History and Director of the Centre for Intelligence and International Security Studies at Aberystwyth University. Hughes is the reviews editor of *Intelligence & National Security*, the world?s leading journal on the role of intelligence in international affairs, and the editor of the UK Study Group on Intelligence newsletter. His publications include *Germany and the Cold War: The Search for a European D?tente, 1949?1967* (2007), *The Postwar Legacy of Appeasement: British Foreign Policy Since 1945* (2014), and *The Cuban Missile Crisis: A Critical Reappraisal* (2016). R. Gerald Hughes is a member of the Society for Historians of American Foreign Relations (SHAFR) and a Fellow of the Royal Historical Society (FRHistS).This lead chapter in an edited book represents an assessment of the long-standing search for a unifying theory of intelligence since 1945