Most people think the risks of reproductive cloning are so high as to make trying to clone a person immoral. Even if the medical risks could be reduced greatly, many believe a clone would still risk great psychological harm, and that the practice of reproductive cloning would also be detrimental to society. Others dismiss these concerns as speculative, and point to the possible good they believe it could do. But we need not wait for the first clone to be born to systematically consider the possible psychological and social ramifications of cloning. Marshalling psychological and sociological...