 Attempts to extend the use of the concept of style in art to other domains of human endeavors abound in the early twentieth century. A well-known case is Mannheim’s sociological attempt to characterize styles of thought within different social groups (Mannheim 1928). While Mannheim had not excluded scientific thought from the realm of sociological analysis of knowledge, he did not actively pursue such an analysis. By contrast, Ludwik Fleck practiced a sociological analysis of science in which “styles of thought” played a central role. Fleck focused however on medicine (Fleck 1935).