who wrote against animal experimentation with his book animal liberation?

The book "Animal Liberation," which argues against animal experimentation and for the ethical treatment of animals, was written by the Australian philosopher Peter Singer. Published in 1975, it is considered the foundational philosophical work of the animal liberation movement. Singer rejects speciesism, the discrimination against animals based solely on their species, and emphasizes considering animals' capacity to suffer. His book advocates for vegetarianism or veganism and condemns most animal experimentation unless the benefits outweigh the harm done to animals.