The name of American sociology has been associated with the Chicago School since its inception by Small 1892 and the first 1921 Sociology of Sociology by Park and Burgess. The school of Chicago is the city's interest in the city, the field study and the psychological orientation of Medocoli's achievements. This school has passed through several stages, the first phase, from the date of establishment until the beginning of the second stage, the subject of the research. The research was divided into an introduction, four chapters and a conclusion. The second topic dealt with the place from the point of view of ecological history and the cultural dimension, while the third topic was the social aspect and reviewed the most important orientations of the Chicago school in its early stage. The last section refers to the critique of the school, the conclusion and the list of sources.