
Foreword to The Dreaded Comparison: Animal Slavery and Human Slavery (1996) by Marjorie Spiegel, p. 14 http://books.google.com/books?ei=je4zTPjrBcmTnQfXmMCLBA&ct=result&id=8u_tAAAAMAAJ&dq=dreaded+comparison+%22exist+for+their+own%22&q=%22exist+for+their+own%22.