He began teaching in the Department of Philosophy at Queen's University in 1966, and remained at the institution until his retirement to Armidale, New South Wales, Australia, in 2005.
He reported that critical reviews and the comments of a personal friend had been able to awaken him from "dogmatic slumber" about human duties to animals.
[4] Years later, Fox published a paper in Organization & Environment entitled "The Case Against Animal Experimentation", representing the "reversal of the view [he] once defended".
[13] After retracting his arguments in The Case for Animal Experimentation, Fox went on to author Deep Vegetarianism with Temple University Press in 1999.
[22] In the latter book, Fox presents peace as a way of life and an ideal to be aimed for, asking the question of why humans engage in violent activity and what can be done to prevent violence.