Answer: The Division of Labour in Society (French: De la division du travail social) is the doctoral dissertation of the French sociologist Émile Durkheim, published in 1893.
Explanation: Mechanical and organic solidarity, in the theory of the French social scientist Émile Durkheim (1858–1917), the social cohesiveness of small, undifferentiated societies (mechanical) and of societies differentiated by a relatively complex division of labour (organic).