The book chronicles the early history of the secularization and professionalization of social work and examines social workers roles during both world wars, the Depression, and in the era of postwar reconstruction. It includes sections on civil defence, the Cold War, unionization, social work education, regulation of the profession, and other key developments up to the end of the twentieth century. Drawing on extensive archival research as well as personal interviews and secondary literature, the authors provide strong academic evidence of a profession that has endured many important changes and continues to advocate for a just society and a responsive social welfare state. will be of interest to social workers, social work students and educators, social historians, professional associations and anyone interested in understanding the complex nature of people and institutions.