In the closing decades of the last century, many were critical of  American global dominance. But twenty years on America's relative decline has ushered in a new multipolar era that many contend is profoundly more dangerous.   We have an unpredictable conflict in Europe larger than anything since World War II and international tension greater than at any point since the height of the Cold War. Meanwhile from the Middle East to the South China Sea, a host of regional conflicts have the potential to spiral out of control, and the new world order looks increasingly precarious.

Can we navigate to safety through international cooperation and treaties? Do we need to align in power blocks to provide overall defence, or is it safer to remain independent providing less of a threat to others? Or is the only solution for one nation or alliance to once again become globally dominant?