Florian Witold Znaniecki (1882 - 1958) is a sociologist and philosopher born in Poland, but which worked in the United States. It belonged to the sociological École of Chicago. Starting from 1914, it lived alternatively in the United States and in Poland. He is recognized as being one of the founders of modern American sociology.

With William I. Thomas, which recruited it whereas it began a career of philosopher in Poland, it is responsible for one of the series of the most important works in sociology in the United States, the Polish peasant in Europe and in the United States (The Polish Peasant in Europe and America) . This work was published in five volumes between 1918 and 1920. Znaniecki has a rather qualitative approach of sociology, thus one finds in his works of many raw data, of the comments of method, materials biographical composed of letters of peasants. It thus stresses the " accounts of vie" and is interested finally in the social organization and the evolution of the group in this company.

See also:

William Isaac Thomas

Author of (nonexhaustive list):

• The Polish Peasant in Europe and America. Volume 1 & 2: Primary-group organization (with W.I. Thomas) - 1918
• The Polish Peasant in Europe and America. Volume 3: Life record off immigrant year (with W.I. Thomas) - 1919
• The Polish Peasant in Europe and America. Volume 4: Disorganization and reorganization in Poland (with W.I. Thomas) - 1920
• The Polish Peasant in Europe and America. Volume 5: Organization and disorganization in America (with W.I. Thomas) - 1920