The Chicago School occupies a foundational position in the emergence and development of urban sociology because it was the first sustained intellectual movement to treat the city as a distinct social laboratory deserving systematic sociological investigation. Emerging in the early twentieth century at the University of Chicago, this school developed at a moment when American cities were undergoing rapid industrialization, immigration, and spatial expansion. The unprecedented social problems and diversity of urban life compelled sociologists to move beyond abstract theory and engage directly with the lived realities of the city, thereby shaping urban sociology as an empirical and analytical field. One of the most significant contributions of the Chicago School was its methodological innovation. Scholars such as Robert E. Park, Ernest Burgess, and Louis Wirth emphasized fieldwork, participant observation, life histories, and ethnographic studies. Rather than relying solely on statistics or philosophical speculation, they studied neighborhoods, ethnic communities, gangs, and marginal groups through direct engagement. This approach grounded urban sociology in empirical research and established the city