While I agree with the sentiments of Peace and folkle, I think we must live with the fact that Zimbabwe is not a democracy at the moment. All dictators like the results of elections, which "legitimise" their claims to power. Equally, all dictators disregard the results of elections, which produce the "wrong" result from their point of view.
I can offer the examples of Portugal and Spain, which have succeeded as democracies on the death of Fascist dictators. I am still on the lookout for a country in which a peaceful democracy was the immediate outcome of a civil war.