Recent years have seen rights-based victories previously thought impossible:
The modern animal advocacy movement was catalyzed in the 1970s. Philosopher Peter Singer’s 1975 book Animal Liberation popularized the concept of "speciesism" —bias against a being based solely on its species. Shortly after, Tom Regan introduced a strict rights-based approach in The Case for Animal Rights (1983), arguing that animals are "subjects-of-a-life" with inherent value. 3. Key Areas of Concern in the 21st Century the father of utilitarianism
Jeremy Bentham, the father of utilitarianism, fired the opening salvo in 1789. While discussing the treatment of animals, he wrote the most famous line in animal ethics: "The question is not, Can they reason? nor, Can they talk? but, Can they suffer?" Can they reason? nor
