Mugabe's resignation fascinates because the fall of tyrants is always a family story, decline of the father, writ large. What a strange creature he is.

I enjoy tequila, which has a strange effect on people and makes parties more fun than warm white wine.

Every Russian emperor from Peter the Great to Stalin and Putin knows a leader and his security agencies must never be parted. His safety depends on their slavish devotion.

My wife Santa is a fanatical skier, going to Klosters many times a year. To please her, I have for 12 years tried to ski, abseil, mountain-climb, para-scend, heli-ski, land-lauf, ice-skate, toboggan, luge, bobsleigh, yodel, gulp gluhwein, dunk bread in cheese fondue, or even walk in the mountains. I have failed at every one of these pursuits.

All tyrannies are virtuoso displays, over many years, of cunning, risk-taking, terror, delusion, narcissism, showmanship, and charm, distilled into a spectacle of total personal control.