Since the introduction of the term public diplomacy (PD), PD literature has evolved and expanded in different directions, multiplying the research conducted on PD actors, programs, publics, networks, tools, and purposes. Focusing our discussion on the purpose of public diplomacy, the potential mission-driven public diplomacy model called “The Golden Circle of Public Diplomacy” by Cabrera Cuadrado (J Public Diplomacy 2:2, 2022) is used to analyze the WHY of Spain’s public diplomacy, analyzing the grand strategy purpose of the European country since the Franco dictatorship until the present day. This analysis comprises the evolution of Spain’s purpose throughout the following phases: the Franco dictatorship, the arrival of democracy (or Transition), and the beginning of the twenty-first century. Interviews to key PD practitioners were conducted to complement the research. An outlook into the future of Spain’s public diplomacy grand strategy is also included.

自从引入公共外交（PD）一词以来，公共外交文献已向不同方向发展和扩展，增加了对公共外交参与者、项目、公众、网络、工具和目的的研究。我们将讨论重点放在公共外交的目的上，利用卡布雷拉·夸德拉多（Cabrera Cuadrado）提出的“公共外交黄金圈”（J Public Diplomacy 2:2, 2022）潜在的使命驱动型公共外交模型来分析西班牙公共外交的原因，分析了自佛朗哥独裁时期至今欧洲国家的大战略目的。这一分析包括西班牙目标在以下阶段的演变：佛朗哥独裁、民主（或转型）的到来以及二十一世纪初。对主要 PD 从业人员进行了访谈以补充研究。还包括对西班牙公共外交大战略未来的展望。