My work in philosophy of biology is focused mostly on the dysfunction of the concept and category species in evolutionary biology, and on evolutionary individuality.

In applied ethics I have worked and taught in environmental ethics; my work in bioethics is centered on organ markets and medical tourism.

I have a growing interest in the emotional origins of ethical positions and reactions, and especially in repugnance.

Written Work:
Book Manuscript:
Species Problems and Their Resolutions; under review.