The acrimonious nature of the recent G7 summit did nothing to quiet fears of an impending global trade war. After leaving the forum early, U.S. President Donald Trump declined to sign on to a consensus statement that highlighted the need for “free, fair and mutually beneficial” trade and the importance of fighting protectionism. The disputes at the G7 highlight many of the issues addressed in a new book by Wharton management professor Mauro Guillen. In this excerpt from Rude Awakening: Threats to the Global Liberal Order , Guillen discusses the controversy over free trade and its real and perceived winners and losers. He also appeared on the   Knowledge at Wharton show, which airs on SiriusXM channel 111 with John Kirton, director of the G7 Research Group and Olivier Chatain, a professor at HEC business school in Paris and a senior fellow at Wharton’s Mack Institute for Innovation Management , to discuss key takeaways from the G7.…