I agree with you, changing the supreme leader won't change things very much. Even changing the regime won't do much good, it would just be the beginning. Change those who give power to the dictators. If you could change the people living in the country gradually the government would change. But we can't really change others, we can only change ourselves. Maybe it's better to mind our business and let others change gradually. If I can't change it, I should run; I-run, You-run, We-run.
+Observant, there's no opposition here between my words and yours in deed. What I meant by minding our business was that we shouldn't try to persuade, or force other people to think and act like us. Of course everyone would change by being exposed to others people's opinion. You have your idea, and I have mine, you do your job, I do mine, I read your opinion, you read mine, without forcing each other we both learn, and we both change. When the society is enough mature for a change, the change would happen without molotov cocktail, Kalashnikov, guerrilla warfare, suicide bombing or anything forceful.
Of course no change would happen without being exposed to different opinions. But I think at last it’s only yourself that can change you. People can teach you, but you are the one who learns… and changes.