structural:scholar_edition
Political theory

In the Muqaddimah ' s introductory remarks, Ibn Khaldun agrees with the classical republicanism of the Aristotelian proposition that man is political by nature, and that man's interdependence creates the need for the political community. Yet he argues that men and tribes need to defend themselves from potential attacks, and thus political communities are formed. The glue which holds such tribes together and eventually forms "royal authority" or the state, according to Ibn Khaldun, is ʿasabiyyah. He argues that the best type of political community is a caliphate or Islamic state, and argues that the neo-Platonist political theories of al-Farabi and Ibn Sina and the "perfect state" (Madinatu l-Faḍīlah) are useless because God's Law, the sharia, has been revealed to take account of public interest and the afterlife. The second most perfect state, Ibn Khaldun argues, is one based on justice and consideration for public welfare in this life, but not based on religious law and so not beneficial to one's afterlife. Ibn Khaldun calls this state blameworthy. Yet the worst type of state, according to Ibn Khaldun, is a tyranny wherein government usurps property rights and rules with injustice against the rights of men. He argues that if that is not possible for a ruler to be both loved and feared, then it is better to be loved, because fear creates many negative effects in the state's population.

Ibn Khaldun writes that civilizations have lifespans like individuals, and that every state will eventually fall because sedentary luxuries distract them, and eventually government begins to overtax citizens and begin injustice against property rights, and "injustice ruins civilization". Eventually after one dynasty or royal authority falls, it is replaced by another, in a continuous cycle.

The British philosopher-anthropologist Ernest Gellner considered Ibn Khaldun's definition of government, "an institution which prevents injustice other than such as it commits itself", the best in the history of political philosophy.