There is something charmingly quaint about Sam Harris’s new book, Letter to a Christian Nation. If not for religious belief, he says, this country would be pouring resources into such worthy efforts to alleviate suffering as stem cell research, not indulging in hand-wringing over preposterous moral qualms about the destruction of embryos. This and other moral travesties are nothing that a little blast of common sense can’t cure. So Harris is taking off the kid gloves with which religion is publicly treated in America’s budding “civilization of ignorance.” He will “arm secularists in our society” to do battle with religious believers. As if that catechetical effort weren’t enough, he will also “demolish the intellectual and moral pretensions of Christianity in its most committed forms.” All in 112 pages.