Australian moral philosopher and professor at Princeton University, Peter Singer's work challenges people to question whether their behaviour is ethical and highlights blind-spots and moral inconsistencies in our actions. He's a champion for animal rights and believes those lucky enough to have been born in rich countries have a moral obligation to help those living in poverty. He's has also argued for the rights of parents to euthanise severely disabled newborns. Criticism from members of New Zealand's disabled community over his views has prompted SkyCity Auckland to cancel a speaking appearance booked at the venue for June, citing fears that his appearance could damage its reputation. Professor Singer says it's the first time he's been 'de-platformed' in this way in a career spanning 50 years. And although he says he's already been offered another Auckland venue, he's worried about what recent events say about New Zealand's attitudes towards freedom of speech.