One of the most influential political science works written in the post World War II era, the original edition of Essence of Decision is a unique and fascinating examination of the pivotal event of the Cold War. Not simply revised, but completely re-written, the Second Edition of this classic text is a fresh reinterpretation of the theories and events surrounding the Cuban Missile Crisis, incorporating all new information from the Kennedy tapes and recently de-classified Soviet files. The Second Edition refines the arguments presented in the original book in light of Graham Allison's experience as the Assistant Secretary of Defense and the founding Dean of the John F. Kennedy School of Government at Harvard University. The Second Edition also features a new co-author, Philip Zelikow, author of the best-selling and critically-acclaimed The Kennedy Tapes, which was published by Harvard University Press in 1997. Essence of Decision, Second Edition, is a vivid look at decision-making under pressure and is the only single volume work that attempts to answer the enduring question: how should citizens understand the actions of their government?