Peter Singer takes up the case contra clams in Chapter 4 of Animal Liberation: A New Ethic For Our Treatment of Animals (1975). He discusses where to draw the line between those we should not kill and eat and those living things which are far too elemental and primitive to earn the right to live. He writes “Oysters, clams, mussels, scallops, and the like are mollusks, and mollusks are in general very primitive organisms.” An exception is made for the octopus which is a much classier and a super cool mollusk. Since Singer is okay with killing insects, which are primitive invertebrates, he throws lobsters in the pot with the mosquitoes and locusts. Well, if you have ever thrown a living lobster in the boiling pot or dared to watch the horrific procedure, you know that lobsters feel pain. And they have a pronounced desire to continue to live which is why the murderous cook will bind their claws lest he lose a finger. Singer admits it is difficult to draw the line. Unless you are Leviticus I suppose.
So why not avoid the impossible task of making these fine distinctions and simply value life over killing wherever possible. It is unnecessary to kill the clam, unless you are marooned and hungry on a Pacific island, and just eat your broccoli, beans, and barley? Humanity is not a superior life force. [Editor’s Note: here Adriel is going back to Part 1 q.v.]. Peter Singer seems to acknowledge that point in Chapter 1: “All Animals Are Equal.” He writes (in a sort of Kantian fashion) “If possessing a higher degree of intelligence does not entitle one human to eat another for his own ends, how can it entitle humans to exploit nonhumans for the same purpose.” (this is page 7 of the Avon paperback edition.)
So let’s don’t avert our eyes from the boiling lobster or butchered cow. If it seems awful then it is. C. S. Peirce, the developer of the philosophy of Pragmatism, viewed the instinctual response as a valuable tool in resolving ethical dilemmas. (entry on Pragmatism, Stanford Encyclopedia of Philosophy). Some moral decisions simply have no clear rule or guidebook. The fact that we must rely on natural feelings and are not reliably reasoning beings would seem to mean that you listen to your heart, and don’t destroy creatures whether they have a heart or not.