\u201cWho are we?\u201d has always been e central question for philosophers, theologians, scientists and jurists. Nowadays, there are great debates about issues such like how we should consider and what rights we should grant to embryos, fetes, stem cells, patients in vegetative states. From all sides, people make contrasting claims, but combatants seem to duel in the fog. In this book, which is written by three scholars, a new attempt is made to clarify the issue, by analyzing its historical genesis (between philosophy, law, and biology), and its possible solutions