Edit: Just for the record, I did not downvoted you.
Edit: Just for the record, I did not downvoted you.
Edit: Hmm... OK watwut -- the dictators have second movers advantage too? It seems to me that the reason evil juntas get fewer is that without an open society (which is hard without democracy) a country won't get above a certain economic level. The "Resource curse" counteract that and won't end in the Middle East until oil isn't critical.
And do not forget that some of current dictators have and traditionally had Western support which makes opposition against them even harder.
Edit: the second mover has to wait until the dictator gets weak (for whatever reason - it may be caused by outside threat) and power vacuum opens up. Interested parties then fight for power. I would not call any of that "advantage".