50 Years of Peter Singer's Animal Liberation

In 2026 the philosopher Peter Singer turns 80. He’s a most unusual contemporary philosopher: his ideas reach far beyond the academy, sparking widespread public debate and changing minds. His book Animal Liberation (1975) became the best-selling philosophy book of the 20th century, and is considered the founding text of the animal liberation movement.

Singer argued that the moral status of animals depends on their capacity for suffering, rather than any abstract considerations about whether they have ‘rights’. He coined the phrase ‘speciesism’, to highlight humans’ prejudice that their suffering matters more than the suffering of other species. He argued that if anything humans do to an animal causes it to suffer, it’s morally wrong.

Singer’s views have remained remarkably consistent since the mid 1970s. But a look into the archive suggests the world of animal rights activism has gone through several changes. In 1979 File On Four reported on the rise of an anti-vivisectionist movement named for Singer’s book: the Animal liberation Front. Their main concern back then was to raise awareness of scientific experimentation on animals. By 1983, the World At One was reporting on concerns that the Front was using increasingly violent tactics, but Delia Smith was also exposing viewers to the novelty of vegetarian food. Today the importance of animal suffering is recognised in law, and vegan options appear on many menus.

Throughout this change in the animal liberation movement, Peter Singer has been on the front line of the media battle. But he's also provoked controversy, particularly with his views on euthanasia.

Philosopher Jonathan Egid explores the thought, legacy, and extensive media archive of Peter Singer.

Producer: Luke Mulhall