Which philosopher helped engender the animal rights movement by arguing that something was very wrong with the traditional attitude toward animals and their treatment?

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Peter Singer is a prominent philosopher who argued for animal rights in his book "Animal Liberation" and helped engender the animal rights movement by challenging the traditional attitude towards animals and their treatment. He argued that just like humans, animals are sentient beings and that their ability to feel pain and pleasure is a sufficient reason to consider their interests and welfare.

Which Philosopher Helped Engender the Animal Rights Movement by Arguing