The essays in this volume, taken together, span the era of British history from 1780 to the present that has engrossed the attention of Brian Harrison in a career of more than fifty years. In keeping with his diverse interests, they vary widely in subject matter. Yet each contributes, in some fashion, to an appreciation of the complexities of reform in modern Britain. Throughout his career Harrison has demonstrated an unwavering interest in social movements and pressure groups. He has analysed the organisation of reform movements and their bases of support; explored the aspirations and beliefs motivating individuals to start or join such movements; and examined the ideas and ideals shaping their conception of human improvement. No one has done more to show that the significance of a reform movement’s triumphs and disappointments can be grasped only in relation to the forces amassed to resist its claims. The essays gathered here, on the Harrisonian theme of reform and its complexities, form an acknowledgment of the massive mark their honouree has made on the study of modern British history. They are preceded by a Foreword composed by Keith Thomas and an editorial Introduction tracing the course of Harrison’s scholarship and connecting that scholarship to the substance of the essays. The volume encompasses both wide-ranging analytical investigations and telling case studies. All have new things to say on the subject of reform and its complexities in modern Britain.