"This is not (as you have charged) to paint religion with a broad brush. I am very quick to distinguish gradations of bad ideas; some clearly have no consequences at all (or at least not yet); some put civilization itself in peril. The problem with dogmatism, however, is that one can never quite predict how terrible its costs will be. To use one of my favorite examples, consider the Christian dogma that human life begins at the moment of conception: On its face, this belief seems likely to only improve our world. After all, it is the very quintessence of a life-affirming doctrine.