Political philosophy is the study of fundamental questions about the state, government, politics, liberty, justice, property, rights, law and the enforcement of a legal code by authority: what they are, why (or even if) they are needed, what makes a government legitimate, what rights and freedoms it should protect and why, what form it should take and why, what the law is, and what duties citizens owe to a legitimate government, if any, and when it may be legitimately overthrown—if ever. In a vernacular sense, the term "political philosophy" often refers to a general view, or specific ethic, belief or attitude, about politics that does not necessarily belong to the technical discipline of philosophy. Three central concerns of political philosophy have been the political economy by which property rights are defined and access to capital is regulated, the demands of justice in distribution and punishment, and the rules of truth and evidence that determine judgments in the law. Contents: 1 History of political philosophy 1.1 Antiquity 1.2 Medieval Islam 1.3 Medieval Europe 1.4 European Renaissance 1.5 European Age of Enlightenment 1.6 Industrialization and the Modern Era 2 Contemporary political philosophy 3 Influential political philosophers 4 References 5 See also 6 Further reading