Tunisia was once the Roman world's gateway to North Africa. Today, it is a relative backwater, even in the Mediterranean Basin. Its economy has been stagnant since the outbreak of the Arab Spring in 2011, even if its political climate has been more placid than those of other Arab Spring nations. The country has also acquired a paradoxical reputation as a bastion of both democracy and jihadism. The rise of jihadist militancy in the country's backlands has turned Tunisia's uneven development into an urgent global issue. Foreign aid has helped close Tunisia's border with Islamic State-occupied regions of Libya has helped but could backfire. ...