Thomas Hill Green (1836 82) was one of the most influential English thinkers of his time, and he made significant contributions to the development of political liberalism. Much of his career was spent at Balliol College, Oxford: having begun as a student of Benjamin Jowett, he later acted effectively as his second-in-command at the college. Interested for his whole career in social questions, Green supported the temperance movement, the extension of the franchise, and the admission of women to university education. He became Whyte's professor of moral philosophy at Oxford in 1878, and his...

Henry Sidgwick, (1838 1900), philosopher, classicist, lecturer and fellow of Trinity College, Cambridge, and supporter of women's university education, is well known for his Method of Ethics (1874), a significant and influential book on moral theory. First published in 1883, this work considers the role the state plays (and ought to play) in economic life, and whether economics should be considered an Art or a Science. Sidgwick applies his utilitarian views to economics, defending John Stuart Mill's 1848 treatise of the same name. The book calls for a return to traditional political economy...

Sir Leslie Stephen (1832 1904), the founding editor of the Dictionary of National Biography, and a writer on philosophy, ethics, and literature, was educated at Eton, King's College London and Trinity College, Cambridge, where he remained as a fellow and a tutor for a number of years. Though a sickly child, he later became a keen and successful mountaineer, taking part in first ascents of nine peaks in the Alps. In 1871 he became editor of the Cornhill Magazine. During his eleven-year tenure, he wrote two successful books on ethics, including The Science of Ethics in 1892, which was widely...

Sir Leslie Stephen (1832 1904), the founding editor of the Dictionary of National Biography, and a writer on philosophy, ethics, and literature, was educated at Eton, King's College London and Trinity College, Cambridge, where he remained as a fellow and a tutor for a number of years. Though a sickly child, he later became a keen and successful mountaineer, taking part in first ascents of nine peaks in the Alps. In 1871 he became editor of the Cornhill Magazine. During his eleven-year tenure, he wrote two successful books on ethics, including The Science of Ethics in 1892, which was widely...

At the age of eighty-four, Thomas Hobbes (1588 1679) wrote an autobiography in Latin elegaics. Unsurprisingly, it was not as widely read as his two great philosophical works, Leviathan and Behemoth, in which he laid out a set of sociopolitical theories that enraged many of the philosophers and moralists of Europe. In this comprehensive biography, first published in 1904, Sir Leslie Stephen (1832 1904) charts the character and changes of Hobbes' thinking, from the scholasticism of his early Oxford education, to his later devotion to geometry and deductive science. With an emphasis on personal...

The term 'agnostic' was probably coined by T. H. Huxley during a speech to the Metaphysical Society in 1869. From the Greek 'agnostos', 'unknown', it was derived from St Paul's mention of an Athenian altar inscribed 'to the unknown god'. With these overtones of ancient philosophy, agnosticism became the tag of an emergent school of thought which posited that the existence of anything beyond the material and measurable should be considered unknowable. In this collection of seven essays, first published as one volume in 1893, Leslie Stephen (1832 1904) makes a study of the 'unknown'. Across the...

The orphaned son of an Anglican clergyman, David Hartley (1705 57) was originally destined for holy orders. Declining to subscribe to the Thirty-Nine Articles, he turned to medicine and science yet remained a religious believer. This, his most significant work, provides a rigorous analysis of human nature, blending philosophy, psychology and theology. First published in two volumes in 1749, Observations on Man is notable for being based on the doctrine of the association of ideas. It greatly influenced scientists, theologians, social reformers and poets: Samuel Taylor Coleridge, who named his...

The orphaned son of an Anglican clergyman, David Hartley (1705 57) was originally destined for holy orders. Declining to subscribe to the Thirty-Nine Articles, he turned to medicine and science yet remained a religious believer. This, his most significant work, provides a rigorous analysis of human nature, blending philosophy, psychology and theology. First published in two volumes in 1749, Observations on Man is notable for being based on the doctrine of the association of ideas. It greatly influenced scientists, theologians, social reformers and poets: Samuel Taylor Coleridge, who named his...

The Belgian polymath Lambert Adolphe Jacques Quetelet (1796 1874) pioneered social statistics. Applying his training in mathematics to the physical and psychological dimensions of individuals, he identified the 'average man' as characterised by the mean values of measured variables that follow a normal distribution. He believed that comparing the features of individuals against this average would allow scientists to better explore the processes that determine normal and abnormal qualities. Quetelet's methods influenced many, among them Florence Nightingale, and his simple measure for...

A major philosophical mind in his day, William Paley (1743 1805) wrote in a lucid style that made complex ideas more accessible to a wide readership. This work, first published in 1785, was based on the lectures he gave on moral philosophy at Christ's College, Cambridge. Cited in parliamentary debates and remaining on the syllabus at Cambridge into the twentieth century, it stands as one of the most influential texts to emerge from the Enlightenment period in Britain. An orthodox theologian, grounding his utilitarian ethics in strong religious faith, Paley held notably progressive views on...