Some people believe that animals are humans’ friends. The other people might do not think so. Because people have different values of animals, the arguments are commenced. Since 1977, all of three philosophers, Peter Singer, Tom Regan and Carl Cohen have respectively written their work to declare the status of animals. On the one hand, according to Peter Singer’s “All Animals Are Equal(1977) ,” and Tom Regan’s “The Case for Animal Rights(1989),” they claim that people should give equal rights to animals as the way do for human beings, and treat all the animals in certain way no matter how the consequences are; On the other hand, in “The Case for the Use of Animals in Biomedical Research(1986),” Carl Cohen believes that animals have no rights because they are not a part of a group whose typical members are moral agents and able to respond to moral claims. Only human can be the top one of the living beings in the world. Then the other two consider this is a form of speciesism. To see how this long debate’s process, animals’ equal rights and speciesism are the focus. First of all, animals should have equal rights. Peter Singer starts to call for the equal rights for animals. A similarity can be found by Tom Regan. Regan presents the principle, “subject-of-a-life” as the basis of his case for the fundamental rights of animals. Once any being has complicated spiritual life, like desire, belief, memory, intention and a sense of the future, which is a subject of a life. Due to the fact that each subject of a life is an individual who worries and thinks about his or her life, that life is defined with inherent value. Indeed, Regan identifies that being is not important as the state, and concludes that all who have inherent value equally. Therefore, all animals’ equal right should be treated with respect. However, Cohen replies that "animals are not morally self-legislative, cannot possibly be members of a truly moral community
Some people believe that animals are humans’ friends. The other people might do not think so. Because people have different values of animals, the arguments are commenced. Since 1977, all of three philosophers, Peter Singer, Tom Regan and Carl Cohen have respectively written their work to declare the status of animals. On the one hand, according to Peter Singer’s “All Animals Are Equal(1977) ,” and Tom Regan’s “The Case for Animal Rights(1989),” they claim that people should give equal rights to animals as the way do for human beings, and treat all the animals in certain way no matter how the consequences are; On the other hand, in “The Case for the Use of Animals in Biomedical Research(1986),” Carl Cohen believes that animals have no rights because they are not a part of a group whose typical members are moral agents and able to respond to moral claims. Only human can be the top one of the living beings in the world. Then the other two consider this is a form of speciesism. To see how this long debate’s process, animals’ equal rights and speciesism are the focus. First of all, animals should have equal rights. Peter Singer starts to call for the equal rights for animals. A similarity can be found by Tom Regan. Regan presents the principle, “subject-of-a-life” as the basis of his case for the fundamental rights of animals. Once any being has complicated spiritual life, like desire, belief, memory, intention and a sense of the future, which is a subject of a life. Due to the fact that each subject of a life is an individual who worries and thinks about his or her life, that life is defined with inherent value. Indeed, Regan identifies that being is not important as the state, and concludes that all who have inherent value equally. Therefore, all animals’ equal right should be treated with respect. However, Cohen replies that "animals are not morally self-legislative, cannot possibly be members of a truly moral community