In the Dec 28, 2010 issue of the National Post newspaper, there was an article by Megan O’Toole about the shortening ‘shelf life’ of Canadian provincial governments, and in particular the shortening reigns of individual premiers.
The story is available at:
Political scientists have noted this trend elsewhere as well, but it is not at all well understood. The most important fact about the trend is that it is not new, it is ancient. The lengths of dynasties and of individual reigns within dynasties have been steadily declining throughout recorded history. This is taken up at some length in Chapter 1 of The Decline Effect, which I recently posted as my sample chapter.