Conservatives pride themselves on resisting change, which is as it should be. But intelligent deference to tradition and stability can evolve into intellectual sloth and moral fanaticism, as when conservatives simply decline to look up from dogma because the effort to raise their heads and reconsider is too great. The laws concerning marijuana aren't exactly indefensible, because practically nothing is, and the thunderers who tell us to stay the course can always find one man or woman who, having taken marijuana, moved on to severe mental disorder. But that argument, to quote myself, is on the order of saying that every rapist began by masturbating. General rules based on individual victims are unwise. And although there is a perfectly respectable case against using marijuana, the penalties imposed on those who reject that case, or who give way to weakness of resolution, are very difficult to defend.