It is decision time for a world order based on liberal values, former U.S. president Barack Obama said Tuesday in Montreal, where he issued a rousing call for citizens everywhere to defend its gains. Obama painted a stark picture of the global upheaval wrought by globalization, technological advances and climate change. He suggested that the progress made since the end of the Second World War is threatened by an unwillingness to adapt to social change. "It's been clear for some time that the world is at an inflection point," he told a crowd of some 6,000 who packed the Palais...