John Stuart Mill

The ''Columbia Encyclopedia'' describes Mill as occasionally coming "close to socialism, a theory repugnant to his predecessors". He was a proponent of utilitarianism, an ethical theory developed by his predecessor Jeremy Bentham. He contributed to the investigation of scientific methodology, though his knowledge of the topic was based on the writings of others, notably William Whewell, John Herschel, and Auguste Comte, and research carried out for Mill by Alexander Bain. He engaged in written debate with Whewell.
A member of the Liberal Party and author of the early feminist work ''The Subjection of Women'', Mill was also the second Member of Parliament to call for women's suffrage after Henry Hunt in 1832. The ideas presented in his 1859 essay ''On Liberty'' have remained the basis of much political thought, and a copy is passed to the president of the Liberal Democrats (the successor party to Mill's own) as a symbol of office. Provided by Wikipedia