Abstract: It seemed like only minutes after a team of Scottish scientists announced, in late February 1997, that they had successfully cloned a sheep, that governmental officials and private citizens throughout the world called for a ban on cloning human beings. The rush to legislate or issue executive orders was so swift, it is reasonable to wonder why the news that a mammal had been cloned ignited such a stampede to prohibit, even criminalize, attempts to clone humans. These events raise a series of separate, yet related questions. Why does the prospect of cloning human beings incite such strong reactions? What reasons have been proposed for enacting national laws or international conventions to prohibit cloning? Can these prohibitions be justified by sound ethical arguments? Before attempting to answer these questions, let us look first at the responses that called for public policy measures to ban human cloning.