More than two decades after the fall of the Berlin Wall and the collapse of the Soviet Union, Welsh revisits the bold claims of Fukuyama, who declared the triumph of Western liberal democracy and the advent of a more peaceful world. She identifies four main fault lines that threaten global security and economic and social stability: the return of barbarism with the rise of ISIS, the return of mass flight with the Syrian refugee crisis, the return of the Cold War with Vladimir Putin's Russia, and the return of staggering inequality within Western nations. Bestseller. 2016.