Jan Szczepanski's research, devoted mostly to the process of industrialization and changes in the structure of Polish society, provides an analysis of its contemporary history. In his works, like e.g.'Polskie losy' (Polish Ways) there are numerous methodological indications which allow to explain the impact of the past on contemporary Polish issues and which can be used at present, like e.g. a close relation between continuity and change; and the meaning of the evaluating category of social progress. What comes with social progress and the development of postindustrial society is work, widely analyzed in the book 'O indywidualnosci' (On Individuality).