Before revision: Other approaches focus on the problem of the formation of international rules: why states voluntarily adopt international law norms, that limit their freedom of action, in the absence of a world legislature; while other perspectives are policy oriented: they elaborate theoretical frameworks and instruments to criticize the existing norms and to make suggestions on how to improve them.
After revision: Other perspectives are policy oriented: they elaborate theoretical frameworks and instruments to criticize the existing norms and to make suggestions on how to improve them.