http://images.salon.com/video.swf?id=w-77390-2015417
Singer is an Oxford-educated Australian who teaches at Princeton University. He endorses two doctrines that, together, entail utilitarianism. The first is impartialism, which holds that everybody counts for one and nobody for more than one. Nationality, for example, is morally irrelevant, as are race, ethnicity, and spatial distance. The second is negative responsibility, which holds that each of us is as responsible for what he or she allows to happen as for what he or she does. Each of these doctrines, by itself, is uncontroversial. When you conjoin them, however, you get a demanding moral doctrine. Some say too demanding. (Thanks to Bob Hessen for the link.)