Paradigm shifts in human thought always depend on iconoclasts who are not afraid to challenge conventional wisdom. Although our thinking in the past generation about the moral status of animals has advanced in certain respects, its fundamental presuppositions have suffered from a debilitating stagnation. … The fact that we humans tend to be comfortable with a regime of animal exploitation dating back thousands of years is not a justification for our continued subjugation of animals. It is an obstacle that we urgently need to overcome. To this end, what we need more than anything else is thinkers with the courage and the determination to break the images in the temple.

Foreword to Animals as Persons: Essays on the Abolition of Animal Exploitation by Gary L. Francione, Columbia University Press, 2009.