Pete Singer is a pioneer animal rights philosopher.
Along with Tom Regan, Singer helped assemble and lead the first animal
rights and animal liberation movements of the 1960s.
His novel Animal Liberation is considered a monumental, ground-breaking
piece of philosophical literature. Animal Rights caused a watershed
reaction by pushing the animal rights movement into the political
forefront for the first time.
Armed with a doctorate in philosophy, Singer theorized that animals are
victims of speciest discrimination. This simple principle cannot be
rebuked philosophically, morally, ethically, or logically, and as such,
has remained the dominant logical explanation in defense of animal
rights.
Singer has also philosophized on behalf of Darwinism, Evolutionary
Biology, and Zoophilia.