In a situation where many national leaders do the same thing and look out for national interests, and with an issue like global warming, you're likely to get no solution, so I think you have to have some kind of ethical trump on some of those issues.
Peter SingerAt the descriptive level, certainly, you would expect different cultures to develop different sorts of ethics and obviously they have; that doesn't mean that you can't think of overarching ethical principles you would want people to follow in all kinds of places.
Peter SingerThere is no humane slaughter requirement for wild fish caught and killed at sea, nor, in most places, for farmed fish.
Peter SingerWe have a new generation of very rich people who want to do more with their money than buy a lot of expensive toys. They want to live meaningful lives.
Peter SingerAs for cages themselves, an ordinary citizen who kept dogs in similar conditions for their entire lives would risk prosecution for cruelty. A pig producer who keeps an animal of comparable intelligence in this manner, however, is more likely to be rewarded with a tax concession or, in some countries, a direct government subsidy.
Peter Singer