Theory of pluralism talks about such patterns among interest groups.
Interest groups serve a variety of purposes in American culture.
These organizations serve as "vehicles" for political engagement since they represent their members based on shared attitudes rather than geography and encourage interest in public issues.
since they reflect the interests of such a huge number of people and promote widespread political participation, interest groups support democracy. The fact that not all interests are represented equally is one of the challenges that interest groups encounter. Many common interests never get formally organized or acknowledged.
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