The title of the book is a reconstruction of a World War II propaganda poster that read "When you ride alone, you ride with Hitler", which suggested that automobile owners carpool to conserve gasoline for the war effort.There isn't a position Maher isn't willing to oversimplify drastically, but his logic is often compelling, as when he rails against our low taxes, our low rate of foreign aid or our addiction to oil. But it's easy to confuse Maher's urgency with outright alarmism, typified by the mushroom clouds he invokes, and he neglects to connect his rants about...