Fidel Castro "retired" as president of Cuba today. He stayed in power 49 years – that is easy when you do not have to worry about majority votes or term limits and the Constitution is what you say it is. Hearing the name Castro always reminds me of John Derbyshire's gloss on a George Orwell quote -- "Wherever there is a jackboot stomping on a human face there will be a well-heeled Western liberal to explain that the face does, after all, enjoy free health care and 100 percent literacy."
One side note, although Orwell is always quoted as "Jackboots", in actuality, he only mentioned boots. Not really that important, unless you are concerned about precision.