Is inheritable genetic modification the new dividing line in gene therapy? The editors of this searching investigation, representing clinical medicine, public health and biomedical ethics, have established a distinguished team of scientists and scholars to address the issues from the perspectives of biological and social science, law and ethics, including an intriguing Foreword from Peter Singer. Their purpose is to consider how society might deal with the ethical concerns raised by inheritable genetic modification, and to re-examine prevailing views about whether these procedures will ever be ethically and socially justifiable. The book also provides background to define the field, and discusses the biological and technological potential for inheritable genetic modification, its limitations, and its connection with gene therapy, cloning, and other reproductive interventions. For scientists, bioethicists, clinicians, counsellors and public commentators, this is an essential contribution to one of the critical debates in current genetics.