This study aims to show how dispositional characters of political leaders are affected by situational developments during the time‐in‐office. Although newly emerging literature of leadership traits demonstrate that significant events alter leaders’ traits, they mainly focus on the measurement of shocking events on dispositional features, leaving the effect of achievements underexplored. The Iranian nuclear deal of 2015 is one of the most significant successes in the last decade of world politics. Gambling his political career on nuclear talks by promising the Iranian people to solve Iran's decades‐long isolation, President Hassan Rouhani played a momentous role in negotiating the deal. The Joint Comprehensive Plan of Action (JCPOA) was globally recognized as a success of Rouhani's leadership. Using the Leadership Trait Analysis (LTA), this article will show the role of Rouhani's personality in the realization of the historic nuclear deal and measure the effect of such a success on Rouhani's leadership traits.

中文翻译：

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当领导力特质取得历史性成功时：哈桑·鲁哈尼（Hassan Rouhani）和2015年的核协议

这项研究的目的是展示在办公时间内，政治领导人的性格特征如何受到形势发展的影响。尽管新出现的领导力特质文献表明，重大事件改变了领导者的特质，但他们主要侧重于对性格特征上令人震惊的事件进行测量，而成就的影响尚未得到充分挖掘。2015年的伊朗核协议是世界政治过去十年中最重大的成就之一。哈桑·鲁哈尼总统哈桑·鲁哈尼（Hassan Rouhani）总统通过许诺伊朗人民解决伊朗数十年来的孤立，在核谈判中赌博，从事政治工作，在谈判中起了重要作用。联合全面行动计划（JCPOA）被全球认可为鲁哈尼领导层的成功。使用领导力特质分析（LTA），