This article conducts an analysis of public meetings in Great Britain between 1758 and 1834. The profound changes in frequency and character, the enormous increase of public meetings and the sharp decline in the relative frequency of violent gatherings, serve as an indicator of the expansion of the public sphere and its capacity to shape the social process. The article explains the rise of the public meeting and why it became so central to British political life during the nineteenth century through four intertwined changes: the development of British capitalism, the growing importance of Parliament, the multiplied opportunities for political entrepreneurs, and the effect of public contention itself.