This article studies the epidemic of kidnappings across six countries between 1968 and 1990. The goal is to identify those factors that determine the operational decisions made by terrorists. Why and how do terrorists decide to engage in certain types of actions but not others? The article discusses a number of scholarly approaches, and the variables these studies have put forward to explain the decision-making processes within terrorist organizations. The argument made here is that the groups' ideological preferences, strategic analysis, and need to attract media attention did not appear to exert much influence in the terrorists' decision to kidnap. Organizational resources and the nature of the security environment in which the terrorists operated had some bearing. However, kidnappings became attractive when terrorists made a pragmatic evaluation of the reaction by governments and the public and consequently of the costs or benefits of a particular course of action. The decision to carry out a campaign of kidnappings, or to abstain from kidnapping, should be interpreted as clear evidence of terrorist learning. Two types of learning appear to have influenced the adoption of kidnappings: learning by observing others and learning by doing. © 2017 Taylor & Francis Group, LLC.

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