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In sociology, fragmentation refers to the absence or the underdevelopment of connections between the society and the groupings of some members of that society on the lines of a common culture, nationality, race, language, occupation, religion, income level, or other common interests.

This gap between the concerned group and the rest might be social, indicating poor interrelationships among each other; economical based on structural inequalities; institutional in terms of formal and specific political, occupational, educative or associative organizations and/or geographic implying regional or residential concentration.