Peter Singer
Professor of Bioethics at Princeton University
Peter Singer is Professor of Bioethics at Princeton University and Laureate Professor at the University of Melbourne. His books include 'Animal Liberation', 'Practical Ethics', 'The Point of View of the Universe' (with Katarzyna de Lazari-Radek), and, most recently, 'The Most Good You Can Do'.

Should we study geoengineering a lot more?
As our planet's climate heats up, so, too, does the debate about the boldest response to it: geoengineering, or the deliberate modification of the atmosphere to combat global warming.
Will the Church finally rethink contraception?
Could the Roman Catholic Church be ready to reconsider its prohibition of the use of contraception? The fact that prominent Catholic conservatives have felt the need to speak out against such a possibility gives some grounds for thinking that, within the Church itself, and under the protection of Pope Francis, a movement for change is underway.
Quitting what you're doing while still on top
Last month, Jacinda Ardern, New Zealand's 42-year-old prime minister, resigned from office, despite the support of a solid parliamentary majority and no challenge to her leadership from within her party. New Zealanders have to go back only six years to find a precedent. In 2016, John Key surprised everyone when, at the age of 55, he made way for his deputy to take over.
FTX saga shows not all ends justify means
In the wake of the collapse of the cryptocurrency exchange FTX, and amid reports that FTX's founder, Sam Bankman-Fried, diverted billions of dollars of clients' funds, some observers have linked the alleged financial malpractice to ideas widely held within the "effective altruism" movement, which Mr Bankman-Fried says inspired him. More specifically, they point to the ethical view that the end justifies the means.
Who are the beneficiaries of 'free speech'?
How is it that a man who has banned 83 million people from Twitter can freely use the platform to post his messages denigrating women and supporting the brutal attack on the writer Salman Rushdie? I'm referring to the leader of the Islamic Republic of Iran, Ayatollah Ali Khamenei, whose government is killing young women who want to be able to show their hair in public.
Research ethics on non-human subjects 'lacking'
In August, Springer Nature, the publisher of 3,000 academic journals, including the "Nature" portfolio of the world's most influential science journals, announced new ethics guidance for its editors, addressing the balance between academic freedom and the risk that publication of some research will harm specific groups of humans. The guidance also mentions, though much more briefly, research using animals.
Do we share a childish sense of morality?
Consider the following statements describing our moral judgements:
Don't be a bystander to mass famine
In March 1964, The New York Times reported that 38 witnesses saw or heard a brutal, drawn-out, and ultimately fatal attack on a woman called Kitty Genovese, but none did anything to help her or even summoned the police. The report was later shown to be erroneous, but the "bystander effect" is real. As many psychology experiments have shown, an individual is less likely to come to the aid of another if they can see that other people who could help are not doing so.
When vaccination is a 'crime'
On Dec 29 last year, Hasan Gokal, the medical director of the Covid-19 response team in Harris County, Texas (which includes Houston, the fourth-largest city in the United States by population), was supervising the administration of the Moderna vaccine, mostly to emergency workers. The vaccine comes in vials containing 11 doses. A vial, once opened, expires in six hours and unused vaccine must then be thrown away.
Stop buying Saudi oil
Khashoggi's murder should open our eyes to the Saudis' other murderous activities, using the money we pay for oil to indoctrinate in fundamentalist Islam.