Lefty

From Giulio Cesare (and before him, apparently, Alexander the Great) to Napoleon Bonaparte and Fidel Castro. From Michelangelo to Picasso, passing from Raffaello*. From Ludwig van Beethoven to Jimi Hendrix, Bob Dylan and Paul Mc Cartney. From Lewis Carroll to Moravia. From Mc Enroe to Maradona (or Gigi Riva if you prefer). From Bill Clinton to Barak Obama. Charlie Chaplin. Bill Gates. Albert Einstein. Gandhi… and our Leonardo (??)

All these people have a common characteristics, which one?

(*) Leonardo da Vinci was ambidexter: he was writing with the left and painting with the right hand - and does not entirely belong to this category.