W. I. Thomas

W. I. Thomas
Thomas, before 1907
Born
William Isaac Thomas

(1863-08-13)13 August 1863
Died5 December 1947(1947-12-05) (aged 84)
Resting placeOld Gray Cemetery,
Knoxville, Tennessee, U.S.
EducationUniversity of Tennessee
University of Chicago
Known forThomas theorem
Spouses
Harriet Park
(m. 1888; div. 1934)
    (m. 1935)
    AwardsHighest oratory honors of the University of Tennessee
    Scientific career
    FieldsSociology
    InstitutionsUniversity of Tennessee, Oberlin College, University of Chicago
    Doctoral advisor
    Signature

    William Isaac Thomas (August 13, 1863 – December 5, 1947) was an American sociologist, understood today as a key figure behind the theory of symbolic interactionism.

    Collaborating with Polish sociologist Florian Znaniecki, Thomas developed and influenced the use of empirical methodologies in sociological research and contributed theories to the sociology of migration. Thomas went on to formulate a fundamental principle of sociology, known as the Thomas theorem, whereby he would contend that "if men define situations as real, they are real in their consequences." This microsociological concept served as a theoretical foundation for the field of symbolic interactionism which was developed by Thomas's younger peers—primarily at the University of Chicago.