Bioethics December 20, 2016 By Warren Whipple Rebecca L. Walker Till-Holger Borchert (editor) 2005 December 16 Encyclopedia of philosophy : 598-605 MacMillan Full article Filed Under: Tags: Rebecca L. Walker More from UNC Center for Bioethics 7th ELSI Congress: Now Accepting Abstracts Spotlight on Nanki Nagpaul, Center Student Associate Jean Cadigan one of 13 New Hastings Center Fellow