The cartel remains in a strong position, the Financial Times counters: “The cartel's influence has long been waning due to oil's declining share of the global energy mix and Opec's declining share of world output thanks to the US shale revolution and rising production in countries such as Canada, Brazil and Guyana. … Opec cannot, of course, be written off. The UAE exit is a fundamental fracture but Opec has survived the departures in recent years of Qatar, Angola and Ecuador.