Take a look at Norton’s DEMOCRACY AND MORAL DEVELOPMENT (p. 81) as he distinguishes between cardinal virtues and distributed virtues. Cardinal virtues are “indispensable to worthy living of every kind,” such as Plato’s famous four of wisdom, courage, temperance, and justice. Distributed virtues are those that are “indispensable to worthy lives of some, but not all kinds.” The whole of Chapter 4 discusses this more in depth as well.

Actually, I would argue that “love” is the paramount virtue of society as subscribed by us of the eudaimonistic mind. A good reference on this argument is David Norton in his seminal work, PERSONAL DESTINIES published by Princeton University Press. In it he explains the stages of love, from love of oneself as an identifiable person to universal love which is the highest expression of love. Love is the foundation upon which justice exists. Justice being as Norton states: “The individual who possesses self-knowledge and lives by it manifests justice, first by not laying claim to goods that he or she cannot utilize, and second by actively willing such goods into the hands of those who can utilize them toward self-actualization. What is expressed in both cases is not `selflessness,’ but the proportionality of a self-responsible self that is situated in relations of interdependence with other selves that are, or ought to be, self-responsible. An individual who possesses self-knowledge and lives by its direction recognizes goods to which he or she is not entitled as distractions from his or her proper course of life…And to will to others their true utilities is at the same time the concrete expression of respect for them as ends in themselves and recognition that we stand to gain from the worthy living of others.” Hence, from a libertarian eudainomistic standpoint, justice is not external but internal and can only exist and be recognized by the individual who is able to recognize himself and others in the context of “love.”