Luigino Bruni 
Reciprocity, Altruism and the Civil Society [PDF ebook] 
In praise of heterogeneity

The main emphasis of this new book from Luigino Bruni is a praise of heterogeneity, arguing that society works when different people are able to cooperate in many different ways. The author engages in a novel approach to reciprocity looking at its different forms in society, from cautious or contractual interactions, to the reciprocity of friendshi