Almost any established decision procedure is better than a resort to force; for when force is used, people get hurt and the desire for retaliation is likely to lead to more violence. Moreover, most decision procedures produce results at least as beneficial and just as a resort to force.

— Peter Singer

A majority of people in these surveys also said that America gives too much aid--but when they were asked how much America should give, the median answers ranged from 5 percent to 10 percent of government spending. In other words, people wanted foreign aid 'cut' to an amount five to ten times greater than the United States actually gives!

— Peter Singer

Arguments for preservation based on the beauty of wilderness are sometimes treated as if they were of little weight because they are "merely aesthetic". That is a mistake. We go to great lengths to preserve the artistic treasures of earlier human civilizations. It is difficult to imagine any economic gain that we would be prepared to accept as adequate compensation for, for instance, the destruction of the paintings in the Louvre. How should we compare the aesthetic value of wilderness with that of the paintings in the Louvre? Here, perhaps, judgment does become inescapably subjective; so I shall report my own experiences. I have looked at the paintings in the Louvre, and in many of the other great galleries of Europe and the United States. I think I have a reasonable sense of appreciation of the fine arts; yet I have not had, in any museum, experiences that have filled my aesthetic senses in the way that they are filled when I walk in a natural setting and pause to survey the view from a rocky peak overlooking a forested valley, or by a stream tumbling over moss-covered boulders set amongst tall tree-ferns, growing in the shade of the forest canopy, I do not think I am alone in this; for many people, wilderness is the source of the greatest feelings of aesthetic appreciation, rising to an almost mystical intensity.

— Peter Singer

As far as food is concerned, the great extravagance is not caviar or truffles, but beef, pork and poultry. Some 38 percent of the world's grain crop is now fed to animals, as well as large quantities of soybeans. There are three times as many domestic animals on this planet as there are human beings. The combined weight of the world's 1.28 billion cattle alone exceeds that of the human population. While we look darkly at the number of babies being born in poorer parts of the world, we ignore the over-population of farm animals, to which we ourselves contribute...[t]hat, however, is only part of the damage done by the animals we deliberately breed. The energy intensive factory farming methods of the industrialized nations are responsible for the consumption of huge amounts of fossil fuels. Chemical fertilizers, used to grow the feed crops for cattle in feedlots and pigs and chickens kept indoors in sheds, produce nitrous oxide, another greenhouse gas. Then there is the loss of forests. Everywhere, forest-dwellers, both human and non-human, can be pushed out. Since 1960, 25 percent of the forests of Central America have been cleared for cattle. Once cleared, the poor soils will support grazing for a few years; then the graziers must move on. Shrub takes over the abandoned pasture, but the forest does not return. When the forests are cleared, so the cattle can graze, billions of tons of carbon dioxide are released into the atmosphere. Finally, the world's cattle are thought to produce about 20 percent of the methane released into the atmosphere, and methane traps twenty-five times as much heat from the sun as carbon dioxide. Factory farm manure also produces methane because, unlike manured dropped naturally in the fields, it does not decompose in the presence of oxygen. All of this amounts to a compelling reason...for a plant based diet.

— Peter Singer

A society that decides its controversial issues by ballots does better than one that uses bullets – which, after all, is no more likely to lead to the right conclusion than voting.

— Peter Singer

At least ten times as many people died from preventable, poverty-related diseases on September 11, 2011, as died in the terrorist attack on the World Trade Center and the Pentagon on that black day. The terrorist attacks led to trillions of dollars being spent on the ‘war on terrorism’ and on security measures that have inconvenienced every air traveler since then. The deaths caused by poverty were ignored. So whereas very few people have died from terrorism since September 11, 2001, approximately 30,000 people died from poverty-related causes on September 12, 2001, and on every day between then and now, and will die tomorrow. Even when we consider larger events like the Asian tsunami of 2004, which killed approximately 230,000 people, or the 2010 earthquake in Haiti that killed up to 200,000, we are still talking about numbers that represent just one week’s toll for preventable, poverty-related deaths — and that happens fifty-two weeks in every year.

— Peter Singer

A week-old baby is not a rational and self-aware being, and there are many nonhuman animals whose rationality, self-awareness, capacity to feel and so on, exceed that of a human baby a week or a month old. If, for the reasons I have given, the fetus does not have the same claim to life as a person, it appears that the newborn baby does not either.

— Peter Singer

Cheats prosper until there are enough who bear grudges against them to make sure they do not prosper.

— Peter Singer

Egoism... is not eliminated by economic reorganization or by material abundance. When basic needs are satisfied, new 'needs' emerge. In our society, people want no simply clothes, but fashionable clothes; not shelter, but a house to display their wealth and taste.

— Peter Singer

Even in the era of AIDS, sex raises no unique moral issues at all. Decisions about sex may involve considerations about honesty, concern for others, prudence, and so on, but there is nothing special about sex in this respect, for the same could be said of decisions about driving a car. (In fact, the moral issues raised by driving a car, both from an environmental and from a safety point of view, are much more serious than those raised by sex.)

— Peter Singer