Pierre-Joseph Proudhon (UK: /ˈpruːdɒ̃/, US: /pruːˈdɒ̃, pruːˈdoʊn/, French: [pjɛʁ ʒɔzɛf pʁudɔ̃]; 15 January 1809, Besançon – 19 January 1865, Paris) was a French socialist, politician, philosopher, economist and the founder of mutualist philosophy. He was the first person to declare himself an anarchist, using that term and is widely regarded as one of anarchism's most influential theorists. Proudhon is considered by many to be the "father of anarchism". Proudhon became a member of the French Parliament after the Revolution of 1848, whereafter he referred to himself as a federalist. Proudhon described the liberty he pursued as "the synthesis of communism and property". Some consider his mutualism to be part of individualist anarchism while others regard it to be part of social anarchism.