Book excerpt: Identity is considered prima facie the most important philosophical principle in traditional logic and metaphysics. The reflexive ability of the subject implies that he or she can relate to himself or herself and to others, thus establishing the basis for the formation of individual and social identity. The present essays, which contains papers held at the conference of the "Institut International de Philosophie" at the University of Zadar, in 2007, present a range of positions and arguments regarding the possibilities of philosophical interpretation of identity.