This chapter is set in the context of the introduction of an outright ban on smoking in the workplace in 2004, an initiative that is widely regarded by Irish politicians, public health and anti-smoking advocates as a story of success, despite ‘common sense’ commentaries at the time suggested that the ban would be too radical a proposal.Drawing on commentaries from broadsheet newspapers and political speeches from the time, this chapter analyses the introduction of the smoking ban in Ireland as a successful exercise in ‘the conduct of conduct’ (Foucault, 1982) by exploring the types of conduct that were embraced and promoted in the context of the debates over the ban. Informed by the centrality of notions of rational, responsible and civilized selfhood in contemporary public health and health promotion discourses, the chapter reveals how notions of what came to be promoted as rational, responsible and civilized behaviours, and their flipside, irrational, irresponsible and uncivilized ones, were central to the exercise of power. It also reflects on how the regulation of smoking became interlinked with social and moral processes, and how some of these played a symbolic role in promoting boundaries between different social groups.