Addams' role as reformer enabled her to petition the establishment at and alter the social and physical geography of her Chicago neighborhood. Although contemporary academic sociologists defined her engagement as "social work," Addams' efforts differed significantly from activities typically labeled as "social work" during that time period. Before Addams' powerful influence on the profession, social work was largely informed by a "friendly visitor" model in which typically wealthy women of high public stature visited impoverished individuals and, through systematic assessment and intervention, aimed to improve the lives of the poor. Addams rejected the friendly visitor model in favor of a model of social reform/social theory-building, thereby introducing the now-central tenets of social justice and reform to the field of social work.