Jeffrey Hornung is a senior political scientist at the nonprofit, nonpartisan RAND Corp.
A return to rotating leaders could prove costly


Shinzo Abe, center, salutes during the fleet review of the Japan Maritime Self-Defense Force in Sagami Bay, off Yokosuka, in October 2006: Abe passed security legislation that made collective self-defense legal.
Jeffrey Hornung is a senior political scientist at the nonprofit, nonpartisan RAND Corp.