Clones.

"Never Let Me Go," the new novel by Kazuo Ishiguro, with themes that remind me of "The Handmaid's Tale," is reviewed in Slate by Margaret Atwood, the author of "The Handmaid's Tale."

Hailsham [a mysterious school] exists to raise cloned children who have been brought into the world for the sole purpose of providing organs to other, "normal" people. They don't have parents. They can't have children. Once they graduate, they will go through a period of being "carers" to others of their kind who are already being deprived of their organs; then they will undergo up to four "donations" themselves, until they "complete." (None of these terms has originated with Ishiguro; he just gives them an extra twist.) The whole enterprise, like most human enterprises of dubious morality, is wrapped in euphemism and shadow: The outer world wants these children to exist because it's greedy for the benefits they can confer, but it doesn't wish to look head-on at what is happening. We assume—though it's never stated—that whatever objections might have been raised to such a scheme have already been overcome: By now the rules are in place and the situation is taken for granted—as slavery was once—by beneficiaries and victims alike.

All this is background. Ishiguro isn't much interested in the practicalities of cloning and organ donation. (Which four organs, you may wonder? A liver, two kidneys, then the heart? But wouldn't you be dead after the second kidney, anyway? Or are we throwing in the pancreas?) ...

[T]he book is also about our wish to do well, to attract approval. The children's poignant desire to be patted on the head—to be a "good carer," keeping those from whom organs are being taken from becoming too distressed; to be a "good donor," someone who makes it through all four "donations"—is heartbreaking. This is what traps them in their cage: None of them thinks about running away or revenging themselves upon the "normal" members of society. Ruth takes refuge in grandiose lies about herself and in daydreams—maybe she'll be allowed to get an office job. Tommy reacts with occasional rage to the unconscionable things being done to him, but then apologizes for his loss of control. In Ishiguro's world, as in our own, most people do what they're told.