The commission found that information-sharing among America's overlapping and rivalrous intelligence agencies was poor.

ECONOMIST: America and Britain on guard | The

The Kurds themselves are divided between two rivalrous parties that have fought before and might do so again.

ECONOMIST: Now it is America's moment in the Middle East

First, Mr Naughtie elects to examine British politics through a particular lens: the rivalrous relationship between Tony Blair and Gordon Brown, his chancellor of the exchequer and presumed successor.

ECONOMIST: British politics

Like the cleverest smears, however, this episode will stick to him, because it seems to confirm something already suspected about Mr Brown and his government: that some of its members and its rivalrous leader are monomaniacal about the getting and hoarding of power.

ECONOMIST: Bagehot