Such a conviction lacking justice with a severely affects the other person. Therefore, the teachings of the Islamic religion, it emphasized the importance of Justice, because it will make peace among the society.
If convicted as a lack of judgment, any party will contribute strongly to the other party. So the teachings of Islam, he emphasized the importance of social justice because it will make peace.
Such as the lack of a fair decision, if one party will result in serious damage to the other party. So in the teachings of Islam have stressed that the importance of justice because that would make the society in peace.