This paper argues that the various approaches to ethics that bioethicists rely on are not adequate to provide effective moral guidance in how to avoid a series of looming human catastrophes (associated with such threats as environmental degradation, war, extreme poverty, and pandemics). It proposes development of a new approach to ethics, dubbed public ethics, that simultaneously investigates moral responsibilities at multiple levels of human organization from the individual to international bodies. It argues that feminist relational theory can provide guidance (...) to development of this new type of ethics, and it warns against obstacles bioethicists face in its pursuit. (shrink)