Editing Peter Singer (section)

=== Other views ===
====Zoophilia====
In a 2001 review of Midas Dekkers's ''[[Dearest Pet: On Bestiality]]'',<ref name="heavy">"[http://www.nerve.com/Opinions/Singer/heavyPetting/main.asp Heavy Petting]", ''Nerve'', March 2001.</ref> Singer stated that "mutually satisfying activities" of a sexual nature may sometimes occur between humans and animals and that writer Otto Soyka would condone such activities. Singer states that Dekkers believes that zoophilia should remain illegal if it involves what he sees as "cruelty", but otherwise is no cause for shock or horror. Singer believes that although sex between species is not normal or natural,<ref>In one decidedly non-academic interview, Singer said that he is "not in favor" of having sex with animals, and that having sex with other people is "more fun." (''The Colbert Report'', Comedy Central, December 11, 2006.)</ref> it does not constitute a transgression of our status as human beings, because human beings are animals or, more specifically, we are great apes.<ref name="heavy"/> Religious groups, animal rights groups, and others (such as the Christian Vegetarian Association{{Fact|date=February 2007}}) have condemned this view, while the animal rights organization PETA has supported them.<ref>Sarah Boxer, "[http://www.nytimes.com/2001/06/09/arts/09TANK.html?ex=1152504000&en=f35bfd2b6dbe11f7&ei=5070 Yes, but Did Anyone Ask the Animals' Opinion?]", ''The New York Times'', June 9, 2001.</ref>

====Immigration====
Singer holds that affluent nations have a duty to increase their refugee intake greatly. He suggests that such nations begin a yearly doubling of refugee quotas until immigration has reached a level where it is clear that further immigration will, on the whole, do more harm than good.

====The natural environment====
As the natural world is not sentient, Singer claims it has no intrinsic value. However, he says that the value to present and future sentient beings of maintaining the environment is so high that people and their governments should make drastic changes to their way of life to ensure the world's preservation.

====Evolutionary biology and liberal politics====
In ''A Darwinian Left'',<ref>''A Darwinian Left: Politics, Evolution, and Cooperation'', New Haven : Yale University Press, 2000, ISBN 0-300-08323-8.</ref> Singer outlines a plan for the political left to adapt to the lessons of Darwinism and evolutionary biology.  He says that evolutionary psychology suggests that humans naturally tend to be self-interested, and that leftists can't ignore scientific fact simply because it's unpleasant or inconvenient for achieving their political goals.  He further argues that the evidence that selfish tendencies are natural must not be taken as evidence that selfishness is right.  He concludes that game theory (the mathematical study of strategy) and experiments in psychology offer hope that self-interested people will make short-term sacrifices for the good of others, if society provides the right conditions. Essentially Singer claims that although humans possess selfish, competitive tendencies naturally, they have a substantial capacity for cooperation that has also been selected for by evolution. It is the job of the Left, he says, to create those conditions which foster cooperation amongst members of society.