TY - CHAP AB - Abstract The chapter presents an analysis of the decision-making process of leaders on issues of nuclear armament and nuclear disarmament, through four case studies. The first, pertaining armament, is South Africa, with a focus on Pieter Willem Botha, former prime minister and president of South Africa. The second deals with former Libyan President Muammar Gaddafi’s nuclear armament decision. The third case study investigates the decision of former president of South Africa, F. W. De Klerk, on nuclear disarmament. The fourth and final case study uncovers Colonel Muammar Gaddafi’s nuclear disarmament decision.Using the Applied Decision Analysis (ADA) method historical decisions have been analyzed in this chapter for the purpose of identifying each leader’s ‘decision code’. Specifically, were these decisions based on rational calculations or were they influenced more by cognitive decision processes?By revealing a ‘decision code’ using a reverse engineering of the decision processes, I conclude that the three leaders placed high importance on security and geopolitics. By analyzing different dimensions and processes that impacted their decision processes, it is evident that while armament decision utilizes the poliheuristic decision rule, disarmament decisions abide by rational calculations. VL - 28A SN - 978-1-78743-394-6, 978-1-78743-393-9/1572-8323 DO - 10.1108/S1572-832320190000028008 UR - https://doi.org/10.1108/S1572-832320190000028008 AU - Frish Yael PY - 2019 Y1 - 2019/01/01 TI - Leaders’ Decision Calculi on Nuclear Armament and Disarmament T2 - How Do Leaders Make Decisions? T3 - Contributions to Conflict Management, Peace Economics and Development PB - Emerald Publishing Limited SP - 121 EP - 154 Y2 - 2024/04/25 ER -