If there had been any doubt as to how quickly the global economic landscape - and the market perceptions of it - can change, it would have been erased by events during August and September 2015. Concerns about the Chinese economy and fretting over the next move by the U.S. Federal Reserve triggered massive global market volatility in stocks, commodity prices, and exchange rates. And that turmoil underscored a critical imperative: leaders of companies operating around the world need to move beyond old views and conventional wisdom as they set global strategies.