Imam Ali's view of governance and politics
The Commander of the Faithful (a.s.) describes his rule, during which three all-out wars were waged and thousands of soldiers were killed, in a way that it shows his contempt. You should take a look at Nahjul Balaghah in order to see what he has said in this regard. Once, when addressing ibn Abbas, he described it as something which is even less worthy than his old and patched up shoelaces. In another part of Nahjul Balaghah, he said, "Then you would have seen that in my view this world of yours is no better than the sneezing of a goat" [Nahjul Balaghah, Sermon 3].
What value does the sneezing of a goat have? It has no value. He says that this power and this rule is even of less worth and less significance than the sneezing of a goat. In the same sermon, he explains why he accepted government: "If people had not come to me and supporters had not exhausted the argument, [I would not have accepted caliphate]". He said that he accepted caliphate because the people insisted and pledged allegiance to him.
He goes on to explain, "If there had been no pledge of Allah with the learned to the effect that they should not acquiesce in the gluttony of the oppressor and the hunger of the oppressed I would have cast the rope of caliphate on its own shoulders". He says that Allah the Exalted has commanded scholars and knowledgeable personalities to avoid enduring the oppression of oppressors and the hunger of the oppressed. These were the things which drew the Commander of the Faithful towards caliphate. He showed resistance, and even fought against those who plotted against him and who went back on their pledge of allegiance. If it had not been for such things, caliphate would have been worthless to him.