For 10 points, name this work of Emile Durkheim, which introduced the concepts of organic and mechanical solidarity.
This work argues that an extreme case arising from the titular condition is the forgetting of the common tasks and participation in special self tasks.  Another section of this work refutes Herbert Spencer, whom the author claims sees the last title concept sui generis as part of a not true reality. The early pages of this work makes the claim that the only universal feature among crimes is that they are condemned by society in order to introduce the concept of injuring the "common consciousness." The author singles out an increase in communication power and population concentration as two reasons for an increase in dynamic density, which is necessary for the title process to occur. It quotes Jean-Baptiste Say's line "it is sad to have to admit I only produced 1/18th of a pin" in order to examine the anxiety surrounding the title concept, which arises from a shift between two types of positive collectivism. For 10 points, name this work of Emile Durkheim, which introduced the concepts of organic and mechanical solidarity.
This work argues that an extreme case arising from the titular condition is the forgetting of the common tasks and participation in special self tasks.  
The Division of Labor in Society 