”Influence” is a slippery concept, yet one of tremendous relevance for those wishing to understand global politics. From debates on the changing sources of power in the international system, through to analyses of its value as an alternative to the active use of force as a policy instrument, influence has become a recurrent theme in discussions of international relations and foreign policy. In order to provide a better understanding of the multifaceted and shifting nature of influence, this volume looks at how the British government employed various forms of pressure and persuasion to achieve its goals across the twentieth century. By focusing on Britain – a global actor with great power objectives but declining physical means – the collection provides a wide range of case studies to assess how influence was brought to bear on a wide array of non-western cultures and societies. It furthermore allows for an assessment of just how effective – or ineffective – British efforts were at influencing non-Western targets over a hundred years of operations. By shedding important light on the efficacy of British efforts to sustain and advance its interests in the twentieth century, the volume will be of interest not only to historians, but to anyone interested in contemporary problems surrounding the operation of influence as a foreign policy tool.