A 400-page volume, it is the most complete and systematic of Alberoni's works on the love theme. The processes or mechanisms that create love bonds are of four types. The first is the pleasure principle. We bond with those who give us pleasure. It is the process on which a child's love for its mother is founded. In adult life the bonds based on the pleasure principle are fragile because they can break when pleasure ceases. The second mechanism is that of loss. We bond more with love objects which escape us, that are taken away from us. The third mechanism is indication.