RT Journal Article SR Electronic T1 Fear of a female planet: how John Harris came to endorse eugenic social engineering JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 4 OP 7 DO 10.1136/jme.2011.045021 VO 38 IS 1 A1 Robert Sparrow YR 2012 UL http://jme.bmj.com/content/38/1/4.abstract AB In this paper, I respond to criticisms by John Harris, contained in a commentary on my article “Harris, harmed states, and sexed bodies”, which appeared in the Journal of Medical Ethics, volume 37, number 5. I argue that Harris's response to my criticisms exposes the strong eugenic tendencies in his own thought, when he suggests that the reproductive obligations of parents should be determined with reference to a claim about what would enhance ‘society’ or ‘the species’.