Abstract
Modern diplomacy in the 21st century has become increasingly complex, requiring a broader scope or the performance of more tasks that extend beyond the traditional high politics of old. This means that current diplomats must deal with more diverse global concerns due to the nature of the post-Cold War era marked by diplomatic inflation, the decline of US hegemony, the rise of China, nuclear proliferation, climate change, globalisation, the Fourth Industrial Revolution (4IR), and the COVID-19 pandemic. Due to this diversification of the diplomatic agendas and the inclusion of a growing number of stakeholders, the diplomatic field is experiencing an amplified array of challenges. Therefore, this article examines these major changes and their impact on modern diplomacy by utilising the theoretical framework of the English School where the emphasis is on a 'society of states' and a world united by common humanity. The research also employs a comprehensive qualitative analysis of the mentioned post-Cold War issues and how diplomacy can contribute to mitigating them. The paper then concludes by recommending the need for a more specialised diplomatic corps who are well-versed in technological advancements and digital platforms. By becoming more specialised, diplomacy can become more effective and thus, remain a vital tool in navigating the intricacies of contemporary international politics while mitigating the major challenges the globe faces.