The idea that non-human animals have significant moral status is comparatively modern. It owes much to the work of philosopher Peter Singer and his 1975 book 'Animal Liberation'. Animal lovers ...

This meant that animals were not the sort of thing that was entitled to have any rights - or indeed any moral consideration at all. This view comes originally from the Bible, but probably reflects ...

The novelist George Orwell had a different perspective on the moral status of animals. In Animal Farm, he famously observed, “All animals are equal, but some animals are more equal than others.” ...