Truth to Power, the first-ever history of the U.S. National Intelligence Council (NIC), is told through the reflections of its eight Chairs in the period from the end of the Cold War until 2017. Co-editors Robert Hutchings and Gregory Treverton add a substantial introduction placing the NIC in its historical context going all the way back to the Board of National Estimates in the 1940s, as well as a concluding chapter that highlights key themes and judgments. This historic mission of this remarkable but little-known organization, now almost forty years old, is strategic intelligence assessment in service of senior American foreign policymakers. Its signature inside products, National Intelligence Estimates, are now accompanied by the NIC's every-four-years Global Trends. Unclassified, Global Trends has become a noted NIC brand, its release awaited by officials, academics and private sector managers around the world.Each chapter places its particular period of the NIC's history in context (the global situation, the administration, the intelligence community) and assesses the most important issues with which the NIC grappled during the period, acknowledging failures as well as claiming successes. For example, Hutchings' chapter examines the invasion and occupation of Iraq, the fallout from the ill-fated Iraqi WMD estimate, the debate over intelligence community reform, and the year-long National Intelligence Council 2020 project.With the creation of the Director of National Intelligence in 2005, the NIC's mission mushroomed to include direct intelligence support to the two main policymaking committees in the government: the Principals Committee (cabinet secretaries in the foreign affairs departments) and the Deputies Committee (their deputies or number threes). The mission shift took the NIC directly into the thick of the action but at some cost to its abilities to do strategic thinking: of some 700 NIC papers in 2016, more than half were responses to questions from the National Security Adviser or her deputies, most, though hardly all, of which were current and tactical, not longer-term and strategic.