Book excerpt: Human reproductive cloning aims to produce duplicates, i.e., people who are phenotypically and genetically identical to those already in existence. This might appear to actually threaten human dignity, because it calls into question our much-vaunted, precious uniqueness. This is precisely what this book sets out to explore: Whether, in what sense, and to what extent human reproductive cloning can threaten human uniqueness and dignity, particularly by either promoting or violating certain human rights or moral rights.