 Federal political orders can be preferred as the appropriate form of nested organizations, for instance in ‘organic’ conceptions of the political and social order. The federation may promote cooperation, justice or other values among and within member units as well as among and within their constituent units, for instance by monitoring, legislating, enforcing or funding agreements, human rights, immunity from interference, or development. Starting with the family, each larger unit responsible for facilitating the flourishing of member units and securing common goods beyond their reach without a common authority. Such arguments have been offered by such otherwise divergent authors as Althusius, the Catholic traditions of subsidiarity as expressed by popes Leo XIII (1891) and Pius XI (1931), and Proudhon.