But wait, there’s more: “Atlas Shrugged” apparently shaped Mr. Ryan’s views on monetary policy, views that he clings to despite having been repeatedly, completely wrong in his predictions.

In early 2011, Mr. Ryan, newly installed as the chairman of the House Budget Committee, gave Ben Bernanke, the Federal Reserve chairman, a hard time over his expansionary policies. Rising commodity prices and long-term interest rates, he asserted, were harbingers of high inflation to come; “There is nothing more insidious that a country can do to its citizens,” he intoned, “than debase its currency.”

Since then, inflation has remained quiescent while long-term rates have plunged — and the U.S. economy would surely be in much worse shape than it is if Mr. Bernanke had allowed himself to be bullied into monetary tightening. But Mr. Ryan seems undaunted in his monetary views. Why?

Well, it’s right there in that 2005 speech to the Atlas Society, in which he declared that he always goes back to “Francisco d’Anconia’s speech on money” when thinking about monetary policy. Who? Never mind. That speech (which clocks in at a mere 23 paragraphs) is a case of hard-money obsession gone ballistic. Not only does the character in question, a Galt sidekick, call for a return to the gold standard, he denounces the notion of paper money and demands a return to gold coins.

For the record, the U.S. currency supply has consisted overwhelmingly of paper money, not gold and silver coins, since the early 1800s. So if Mr. Ryan really thinks that Francisco d’Anconia had it right, he wants to turn the clock back not one but two centuries.

Does any of this matter? Well, if the Republican ticket wins, Mr. Ryan will surely be an influential force in the next administration — and bear in mind, too, that he would, as the cliché goes, be a heartbeat away from the presidency. So it should worry us that Mr. Ryan holds monetary views that would, if put into practice, go a long way toward recreating the Great Depression.

And, beyond that, consider the fact that Mr. Ryan is considered the modern G.O.P.’s big thinker. What does it say about the party when its intellectual leader evidently gets his ideas largely from deeply unrealistic fantasy novels?