Michael Freeden is a professor of politics currently serving as the director of the Centre for Political Ideologies at the University of Oxford where he is also professorial tutor at Mansfield College. He is also the founding editor of the Journal of Political Ideologies.
 Study of ideologies
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Freeden has been noted for his analysis of contemporary ideologies. He has rejected the traditional definition of ideologies, which sees the latter as static "belief systems", and instead bases his analysis on modern semantics. Ideologies – just like languages – consist of certain concepts whose meaning may change and evolve over time. The specific relations between ideological concepts may thus be analyzed by being set in their respective semantic fields.
Each ideology may be seen as having both "core" concepts (that is, those of the of highest importance, e.g. class conflict in Marxism or freedom in liberalism) and "peripheral" (or secondary) concepts. Concepts may gain or lose importance over time, just as new concepts may emerge (or be borrowed from other ideologies) or fall out of use entirely. Different ideologies may thus give different meanings to the same term (for instance, a concept such as equality will have a material definition in Marxism, while in liberalism it will rather have a legal and political importance). Concepts are thus defined by their relation to other concepts. According to Freeden, it is precisely these conceptual relations that should attract our attention, as they will be likely to evolve in the long term.
By studying the conceptual evolution of ideologies, Freeden observes that the relative "political success" of an ideology depends on its ability to impose the belief that its own conceptual definitions are the "correct ones". This thus gives rise to a form of "conceptual competition", in which each ideology performs a continuous "decontestation" of its concepts – that is, it tries to eliminate all possible contestation of its own conceptual definitions, thereby rejecting competing definitions (Marxism will thus reject private property as a product of the exploitative nature of capitalism, just as liberalism may view state intervention as an infringement of individual freedoms). Not only is this decontestation the product of an inter-ideological competition (between ideologies), but it is also the product of an intra-ideological competition (within ideologies): hence the success of Hayek's form of neoliberalism during the 1980s, or of the Marxist-Leninist trend in the 1920s.
- The New Liberalism: An Ideology of Social Reform (Oxford, 1978)
- Liberalism Divided: A Study in British Political Thought 1914-1939 (Oxford, 1986)
- J.A. Hobson: A Reader (London, 1988)
- Minutes of the Rainbow Circle 1894-1924, edited and annotated (London, 1989)
- Reappraising J.A. Hobson: Humanism and Welfare (ed.) (London, 1990)
- Rights (Buckingham, 1991)
- Ideologies and Political Theory: A Conceptual Approach (Oxford, 1996)
- Reassessing Political Ideologies: The Durability of Dissent (ed.) (London, 2001)
- Ideology: A Very Short Introduction (Oxford, 2003)
- Liberal Languages: Ideological Imaginations and Twentieth Century Progressive Thought (Princeton, 2005) 
- Taking Ideology Seriously: 21st Century Reconfigurations (co-editor with G. Talshir and M. Humphrey) (London, 2006)
- "Professor Michael Freeden (MA, DPhil (Oxon))". University of Oxford. Retrieved 2011-01-11.