Dr Laurence J. Peter (pictured right), the Canadian born hierarcheologist, is probably best known for
He argued that at some point every position was held by somebody incompetent to do the job and the real work was done by those who had not yet reached their own level of incompetence.
It sounds like former RBS chief Sir Fred Goodwin's professional epitaph.
And any observer of politicians would know that this is especially true in the world of politics where the threshold for the level of incompetence is all too often very low.
Which brings us on neatly to the continuing conflict in Afghanistan and the historical vortex of incompetence that the world's various powers have found themselves in for more than 150 years.
A less well known but even more pessimistic quotation from Dr Peter is on history.
"History teaches us the mistakes we are going to make," he said.
It seems a very apt quote on the day that Gordon Brown orders more troops into Afghanistan following

President Obama's plea for more support in a conflict that eventually, if we look at historical precedent, seems doomed to failure.
The late George MacDonald Fraser's novel Flashman perhaps offers most readable object lesson in history for Afghanistan. it charts the demise of the British army's first catastrophic foray into Afghanistan under the command of the incompetent Scottish Major General Lord Elphinstone(an historical example of the Peter principle) ending up with his force's massacre in January 1842.
MacDonald Fraser's building of history around the hilarious antics of the cowardly, womanising bully Flashman (of Tom Brown's Schooldays infamy) adds pathos to an unfolding tragedy known as the First Afghan War.
Since 1842 the British have been back, the Russians had a go, the Americans have been in along with the British (again) and others. Even with more technical weaponry, none have tamed that country or its warlords.
The cause of stopping terrorism, saving women from the Taliban's awful abuses and turning a failed state into a successful democracy are all worthy and just ones. And it is also true that British troops are currently out-killing Taliban ones - 15 to 200 in the last month.
But in the end every major army has failed in Afghanistan, the sooner this is recognised and the allies get out the less lives may be wasted.