William Thomas

William Isaac Thomas (13 August 1863 – 5 December 1947) was an American sociologist. He is noted for his innovative work on the sociology of migration on which he co-operated with Florian Znaniecki, and for his formulation of what became known as the Thomas theorem, a fundamental principle of sociology: "If men define situations as real, they are real in their consequences". Continue Reading »

The Polish Peasant in Europe and America

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