No wonder that there was huge interest in Berlin theater director Frank Castorf’s production of this year’s Der Ring des Nibelungen (The Ring of the Nibelung), a cycle of four epic operas.

Castorf is no stranger to controversy. He loves defying convention with his super modern and super radical interpretations.

To conservatives, Castorf’s production of Das Rheingold (The Rhine Gold), the first opera in the Ring cycle performed last week in Bayreuth, must have seemed positively sacrilegious.

The setting has nothing to do with the lush banks of the Rhine River. Instead, the opera is set in a sleazy motel alongside a gas station on Route 66 in the United States, the country’s most famous highway.

In Castorf’s adaptation, Wotan and other gods are portrayed as mobsters and hookers, all up to no good. The Rhine maidens—originally water nymphs that guard the Rhine gold—are tough prostitutes, provocatively dressed to suit the atmosphere of murder, theft, and conspiracy.

The giants Fafner and Fasolt are decked out as thugs with baseball bats, while the fire god Loge is a paparazzo. The stage is a hive of activity. Scenes include a Mercedes-Benz convertible and a camper being driven and then hauled across the stage.

But the essence of Castorf’s production is not just substituting German nature and myth with American lowlife and intrigue. It’s about substituting gold with oil.

“I asked myself what The Rhine Gold can mean to us,” Castorf said in an interview with German broadcaster Deutsche Welle. “And I assumed that oil plays a similar role for us today as gold in the Ring. Our technological progress, our luxuries, and our economy all depend on oil.”

Well, it is certainly fascinating that Castorf used American oil as a metaphor for power, money, and vice. But while that may have been true even ten years ago, hasn’t the world moved on? Did Castorf forget to read up on shale gas?

Shale gas is at the heart of the energy revolution now taking place in the United States, with immense consequences for the country’s foreign policy and domestic economy. The vast reserves of shale gas that American companies are exploring at breakneck speed are setting the United States on the road to energy self-sufficiency.

In political terms, this means that the United States will no longer be dependent on the vagaries of the Organization of the Petroleum Exporting Countries oil cartel. Washington will also be less inclined to intervene in conflicts in countries that possess oil reserves.

Above all, the shale gas revolution will influence how the United States views its long-term strategic interests in the Middle East. If those interests are no longer based on the need to secure large supplies of oil, Washington’s attitude to authoritarian countries like Saudi Arabia may change quite drastically.

The Europeans should be asking what these changes will mean for them in terms of geostrategic relations. They should also be asking how they could use shale gas to reduce their dependence on Russia.

Just as Middle Eastern oil influenced U.S. policy, Russia’s political power games in Eastern Europe would change dramatically if Russia could no longer rely on the lever of withholding energy deliveries or dictating prices.

Under these circumstances, it seems a bit old-fashioned for such a cutting-edge German theater producer to have his gods squabble over oil. Productions of Das Rheingold should either catch up with America’s changing energy market or stick to gold.