This book investigates whether the moral arguments surrounding human enhancement technologies are supported by rigorous philosophical reasoning or driven by underlying psychological biases. The authors, a team of international ethicists including C. A. J. Coady, Julian Savulescu, and Steve Clarke, evaluate the divide between those who welcome enhancement and those who find it morally objectionable. They synthesize current scientific research with moral philosophy to determine if the alarmist or optimistic reactions to these technologies hold up under logical scrutiny.

Experts recognize this work as a significant contribution to the field of bioethics, noting its ability to bridge the gap between abstract moral philosophy and concrete scientific advancement. Readers frequently highlight the academic density of the prose, which serves as a rigorous resource for students and professionals engaged in the ethics of emerging technologies.