In spite of the recent diversity and vitality of common-interest associations,some have noted a recent decline in participation in all types of these groups,at least in North America.How can this decline in participation be explained?

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The Answer of In spite of the recent diversity and vitality of common-interest associations,some have noted a recent decline in participation in all types of these groups,at least in North America.How can this decline in participation be explained?

In Spite of the Recent Diversity and Vitality of Common-Interest