Animals' Rights Considered in Relation to Social Progress Quotes

“Whatever my own practice may be,” wrote Thoreau, “I have no doubt that it is a part of the destiny of the human race, in its gradual improvement, to leave off eating animals, as surely as the savage tribes have left off eating each other when they came in contact with the more civilized.”
― Henry S. Salt, Animals' Rights: Considered in Relation to Social Progress: Ethical Insights on Animal Rights and Social Progress