1882 – He was born on the 15th day of January this year in Zwietniki, Poland. He studied in Geneva, Zurich and Paris and obtained his PhD at the Jagiellonian University in Kraków. He also taught and wrote in Poland and the United States.
1914 – He came to Chicago in the United States.
1918 – He achieves international fame as the co-author with William I. Thomas of The Polish Peasant in Europe and America, considered the foundation of modern Empirical Sociology and Humanistic Sociology.
1920 – He returned to the Second Polish Republic in 1920 to accept the first Polish chair in sociology at the University in PoznaD.
1931 – He lectured at Columbia University in New York.
1934 – He formulated the principle of analytic induction, designed to identify universal propositions and causal laws.
1954 – His Presidential Address, "Basic Problems of Contemporary Sociology," was delivered on September 8, 1954 at the Association’s Annual Meeting, and was later published in the American Sociological Review
1958 – He died in the town of Champaign, Illinois, USA after his retirement, and deciding not to return to the communist People’s Republic of Poland.