Dynamic density

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In sociology, dynamic density refers to the combination of two things: population density and the amount of social interaction within that population. Émile Durkheim used the term to explain why societies transition from simple to more complex forms, specifically in terms of the division of labor within that society. He suggested that it required both an increase in population and an increase in the frequency of social interaction to form more specialised occupations, which then leads to a new type of society. People in this new type of society are less independent and more reliant on each other and therefore develop what he called organic solidarity, where people no longer are bound by the same morality and sense of purpose. Critics suggest that it is not a testable hypothesis, and nor does it follow logically that dynamic density would cause this new type of solidarity, supposing it actually existed.