This chapter examines the origins of health promotion in the UK. It begins with a discussion of diseases in Britain before and during the nineteenth century that made public health a major concern of governments, followed by an analysis of the role of William Farr in establishing a system that recorded the cause of death, along with three important pieces of legislation: Poor Law Amendment Act 1834, Public Health Act 1848, and Public Health Act 1875. The chapter then considers disease monitoring and surveillance before describing Charles Booth's work on poverty in the late nineteenth century, Benjamin Seebohm Rowntree's poverty surveys, and the consequences of the Boer Wars for public health. Finally, it explores key legislation in the twentieth century prior to the establishment of the NHS, the emergence of a new public health, and the impact of health promotion on the social determinants of health.