The following article attempts to highlight that not all types of social capital can produce a Common Good, indeed, some are placed in opposite directions to this goal. In this direction it attempts to extrapolate the features that social capital should possess in order to create common well-being rooted and widespread. The author will retrace the main definitions of the concept dealing with the internal tension between "self-interest and collective one". Through the phenomenology of Alfred Schütz, as a basis for the construction of knowledge, he proposes the developmental dimension in which this tension may dissolve, and at the same time, the possible features that social capital should have to produce a Common Good. This kind of social capital is called ethics, in the meaning of potentially universal and essential to the identities of peoples of whole humanity, conceived as related. We can observe how this social capital produce and empower continuously ethical heritage of the peoples needed to generate life in the long time. This process is summarized in what is called the Socialization of the economy.
Keywords: Social Capital, Ethics, Heritage, Socialization, Common Good.