The great diffusion of social networks and their role in modern society are among the more interesting novelties in recent years, capturing the interest of researchers, journalists, companies, and governments. The dense interconnection that often arises among active users generates a discussion space that is able to motivate and involve individuals, linking people with common objectives and facilitating diverse forms of collective action. This gives rise to what is called “individualism on the net”: instead of always counting on a single reference community, thanks to the social networks it becomes possible to be stimulated by moving among more people and resources, which are often heterogeneous. Social networks are therefore creating ...

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