As governor of the Bank of England since mid-2013, Carney has displayed boldness and finesse—just as he did while central-bank chief in his native Canada during the financial crisis. Back then he was credited with keeping Canada’s economy healthy, even as other developed nations raced to the brink. Now, with Carney’s steady hand, the U.K.’s economy is revving up too. The IMF predicts it will grow far faster this year than any other major European economy.