Philosopher Peter Singer: ‘There’s no reason to say humans have more worth or moral status than animals’

The controversial author on the importance of updating his landmark book on animal liberation, being flexibly vegan' and the ethical dangers of artificial intelligence for the non-human world

Australian philosopher Peter Singer's book Animal Liberation, published in 1975, exposed the realities of life for animals in factory farms and testing laboratories and provided a powerful moral basis for rethinking our relationship to them. Now, nearly 50 years on, Singer, 76, has a revised version titled Animal Liberation Now. It comes on the heels of an updated edition of his popular Ethics in the Real World, a collection of short essays dissecting important current events, first published in 2016. Singer, a utilitarian, is a professor of bioethics at Princeton University. In addition to his work on animal ethics, he is also regarded as the philosophical originator of a philanthropic social movement known as effective altruism, which argues for weighing up causes to achieve the most good. He is considered one of the world's most influential - and controversial - philosophers.

Why write Animal Liberation Now?
The last full update was 1990. Though the philosophical arguments have stood up well, the chapters that describe factory farming and what we do to animals in labs needed to be almost completely rewritten. I also hadn't really discussed factory farming's contribution to the climate crisis and I wanted to reflect on our progress towards animal rights. Effectively, this is a new book for the next generation, hence the new title.