A great number of books and articles has been published attempting to explore and explain the Cuban missile crisis that had brought the world to the brink of a thermonuclear world war. Allison and Zelikow, in Essence of Decision, explain the Cuban missile crisis through three different lenses, that is, The Rational Actor Paradigm, Organizational Behavior Paradigm and Governmental Politics Paradigm, each of which is based on a different set of assumptions, each of which has a distinct bundle of organizing concepts and, each of which brings different general/specific propositions for the issue under question. Allison and Zelikow investigate the Cuban missile crisis through the lenses of three models in turn by asking three simple questions:
1. Why did the Soviet Union decide to place offensive missiles in Cuba?
2. Why did the United States respond to the missile deployment with a blockade?
3. Why did the Soviet Union withdraw the missiles?
The analyst looking to Cuban missile crisis through the lens of "rational actor model" conceives of governmental action as a "choice" made by a unitary and rational nation or national government. In this model, national government is treated as if it is an "individual" identifying problem, producing solution alternatives and picking one of those alternatives up whose result would satisfy the expected utility function of the nation best based on the "purpose" of the nation. The rational actor model analyst generates hypotheses, for example, about why the Soviet Union decided to send nuclear missiles to Cuba: to defend Cuba, rectify the nuclear strategic balance, or provide an advantage in the confrontation over Berlin? The virtue of the model comes from its power of explanation especially in case it is able to expose the "purpose" of the nation/state. So all the puzzling pieces of the relevant issue under question are to be tied into a coherent and satisfactory story.
The rational actor model falls short of fully understanding of the issue under question in that it does not take account of other equally important considerations. Admittedly, the rational actor model neglects the organizational processes and capabilities that structure the issue or problem under question, and, limit or extend the policy alternatives available to "rational" policy actors. In final instant, it is manifest that policy executives have to decide policy alternative from the "menu" that current organizational technologies and capabilities write. In organizational behavior model, the analyst investigates, for example, the standard operating procedures (SOP) of government organizations in order to understand which policy alternatives are available to political actors and which one is chosen and why. So, the organizational behavior paradigm closes the gaps of the rational actor paradigm.
Finally, the governmental politics model conceives of governmental policy under question not as a rational actor choice or organizational output but as a "resultant" of bargaining along regular circuits among players positioned hierarchically within the government. In this model, the political actors and their intentions, positions and interests, their relative power, the action channels through which the political actors input and exert their influence, decision rules and similar matters stand to the fore in analysis.
The three models, according to Allison and Zelikow, are complementary to each other. "Model I fixes the broader context, the larger national patterns, and the shared images. Within this context, Model II illuminates the organizational routines that produce the information, options, and action. Model III focuses in greater detail on the individuals who constitute a government and the politics and procedures by which their competing perceptions and preferences are combined" (p. 392). Rather than giving different answers to the same question, each of the three models illuminates one corner of the issue and contributes to our understanding. By integrating the factors identified under each lens, the authors argue, explanations can be significantly strengthened.
The final chapter of the book in which the authors hypothetically demonstrate how the interaction of the factors identified under each lens can lead to a nuclear war should be perused by those who firmly believe that after the collapse of the Soviet Union there no longer exists the precipice of a nuclear slaughter.
Though I believe this book is a must-read for everybody (not necessary to mention all the fields), I recommend this masterpiece especially to students of strategic management who have read Strategy Safari by Mintzberg et al. (1998) for which I believe Essence of Decision will be an excellent field book and to students who have read Case Study Research by Robert Yin for which I think Essence of Decision will be a perfect workbook.
Overall, this book is a living example of a dedicated and illuminating scholarship. Highly recommended.