Guy Verhofstadt, former prime minister of Belgium from 1999 to 2008 and has served in the European Parliament as president of the Alliance of Liberals and Democrats for Europe since 2009 Europe's Last Chance: Why the European States Must Form a More Perfect Union (Basic Books, 2017), provides a possible framework for understanding President Trump's immigration ban on seven majority-Muslim countries through Europe's perspective, and offers a solution on how the European Union and the West can fight terrorism effectively.