Thomas Nagel at the NYRB:
Kwame Anthony Appiah is a writer and thinker of remarkable range. He began his academic career as an analytic philosopher of language, but soon branched out to become one of the most prominent and respected philosophical voices addressing a wide public on topics of moral and political importance such as race, cosmopolitanism, multiculturalism, codes of honor, and moral psychology. Two years ago he even took on the “Ethicist” column in The New York Times Magazine, and it is easy to become addicted to his incisive answers to the extraordinary variety of real-life moral questions posed by readers.
Appiah’s latest book, As If: Idealization and Ideals, is in part a return to his earlier, more abstract and technical interests. It is derived from his Carus Lectures to the American Philosophical Association and is addressed first of all to a philosophical audience. Yet Appiah writes very clearly, and much of this original and absorbing book will be of interest to general readers.Its theme and its title pay tribute to the work of Hans Vaihinger (1852–1933), a currently neglected German philosopher whose masterwork, published in 1911, was called The Philosophy of “As If.” Vaihinger contended that much of our most fruitful thought about the world, particularly in the sciences, relies on idealizations, or what he called “fictions”—descriptions or laws or theories that are literally false but that provide an easier and more useful way to think about certain subjects than the truth in all its complexity would.