Amazon.com (ISBN 0940322102, Hardcover)

Stephen Jay Gould calls Richard Lewontin "simply the smartest man I have ever met." And not the least opinionated, either. Lewontin has long been famous among biologists for a volatile combination of feisty leftism, scientific insight, and verbal skill, which have been displayed for the more general public in his essays for what has been called The New York Review of Each Other's Books.

It Ain't Necessarily So is a collection of some of his more characteristic reviews from the 1980s and 1990s. The Mismeasure of Man, by Stephen Jay Gould; Unto Others: The Evolution and Psychology of Unselfish Behavior, by Elliott Sober and David Sloan Wilson; sociological studies of Sex in America; and Ruth Hubbard's books on gender in science: all his essays are informative yet lively, with a high acid content--as when he begins his piece on the Human Genome Project with a definition of "fetish."

Lewontin's prose is worth reading in itself, but what lifts this anthology to another level is that it also includes replies and rebuttals selected from the New York Review's letters column--a forum that doubles as the intellectual's World Wrestling Federation. For the older pieces, he also includes updates, "where are they now" summaries to give a sense of historical change in each field. Assertive, brilliant, sarcastic, dense, wide-ranging--Lewontin may be challenging, but he is never dull. --Mary Ellen Curtin