A libertarian critique of H. Tristram Engelhardt, Jr.'s The Foundations of Bioethics.

Although Engelhardt's The Foundations of Bioethics is an impressive work, it is plagued by problems of justification, conceptual confusion, and inconsistencies....A libertarian theory can arrive at the same basic requirements of mutual respect, autonomy, nonuse of force, and tolerance for a wide range of diverse life styles without relying on a lowest-common-denominator principle and without depriving fetuses, infants, and the mentally retarded of their status as persons. This can be done by taking a deontological approach to libertarian theory that denies that all moral beliefs are worthy of respect. Some beliefs, such as Engelhardt's belief that fetuses, infants, and the mentally retarded are nonpersons, simply fall beneath the floor of acceptable moral alternatives, even in a libertarian society, because such beliefs are based on a misunderstanding of personhood and violate the principle of mutual respect.