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Sontag's essay is concerned with the moral implications of looking, through photographs, at people who are suffering or dead. Much of the book is a history of war photography, which is intimately bound with the history of public tolerance of violent photos. While Sontag does not provide any revolutionary ideas, the essay is a succinct and thorough examination of the issues surrounding photography. And, if there is no grand thesis to keep in mind, her exploration is full of smaller, thought-provoking observations. She notes, for example, that displaying photos of dead bodies is less taboo the more foreign and faraway those bodies are. Until she pointed it out, I had not even realised how North American coverage of 9-11 included practically no pictures of corpses, although picturing the dead in foreign conflicts is an expectable way of rallying support for the victims. Her remarks on the way a photo replaces the memory of the thing itself are, if not surprising, good to have restated.

Sontag also does not ignore the uncomfortable reality of the pleasure which most people have in regarding suffering, but in this as in many areas of her essay, I wished that she would go further, spend more time teasing out and elaborating her analysis -- I wished, in other words, that she had written a real book-length book, not a long essay. On the other hand, the incompleteness of her discussion means that it is particularly good at stimulating further thought, at opening questions rather than closing them off.