Excellent Sheep is likely to makea lasting mark for three reasons. One, Mr. Deresiewicz spent twenty-four years in the Ivy League, graduating from Columbia and teaching for a decade at Yale.He brings the gory details. Two, the author is a striker, to put it in soccer terms. He's a vivid writer, a literary critic whose headers tend to land in the back corner of the net. Three, his indictment arrives on wheels: He takes aim at just about the entirety of upper-middle-class life in America.Mr. Deresiewicz's book is packed full of what he wants more of in American life: passionate weirdness.