Religion (Islam) cannot be the reason why there are no Arab democracies. Perhaps the desert slows down the flow of enlightened ideas – and camels build a character of patience that autocrats are adept at exploiting.
The Index measures total impact of weather and climate; geology; geography on resources, services and human populations. Island nations are the most vulnerable; landlocked and sparsely populated ones, less so.
Madagascar is 587,000 sq.km – about the same size as Kenya or Botswana. The other island nations of Africa have a land area of less than 5,000 sq.km