During the 20th Century strong transformations were produced in the field of science. The biological sciences opened up epistemologically in order to offer new explanatory models which superceded the physical, anti-historical and formalistic models. The innovations involved in the evolutionary theory of Darwinism established a new scientific practice, the potentiality of which goes far beyond traditional disciplinary limits. The thesis of Darwin included explanatory models to explain contingent phenomenon, and were applicable to other problems and questionings, widening in this manner the field of possibilitites in scientific explanation. This paper proposes an extension of this analysis to the field of sociology, which, since its birth, has been studied as part of the organicist metaphor, as is testified to in the works of many authors considered as classic theorists (Comte, Spencer, Durkheim). The attention herein centers on the influence of the biologist conception as found in Emile Durkheim, considering as well the ontological and methodological suppositions underlying the normative framework of his work, and taking into account the criteria offered by P. Kitcher in his conceptualization of "scientific practice" as a unit of analysis. [ABSTRACT FROM AUTHOR]