This study investigates the demographic composition, motivations, and political activities of Liberal Democrat party members in Britain to understand their role as a 'third force' in the political landscape. The authors, Antony Billinghurst, Patrick Seyd, and Paul F. Whiteley, utilize a comprehensive, nationally representative survey of grassroots party members to analyze the internal dynamics of the organization. By examining why individuals join the party and how they engage in community and electoral work, the authors provide a rigorous empirical framework for evaluating the party's influence and ideological positioning within the British parliamentary system.

Experts recognize this work as a foundational empirical study for understanding the internal mechanics of the Liberal Democrat party. Scholars frequently cite the text for its methodological rigor in surveying grassroots political participation and its contribution to the study of third-party politics in the United Kingdom.