- published: 12 Mar 2016
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Henry Sidgwick (/ˈsɪdʒwɪk/; 31 May 1838 – 28 August 1900) was an English utilitarian philosopher and economist. He was one of the founders and first president of the Society for Psychical Research and a member of the Metaphysical Society, and promoted the higher education of women. His work in economics has also had a lasting influence. He also founded Newnham College in Cambridge in 1875. Newnham College is a women-only constituent college of the University of Cambridge, England. It was the second Cambridge college to admit women after Girton College. The co-founder of the college was Millicent Garrett Fawcett. He joined the Cambridge Apostles intellectual secret society in 1856.
He was born at Skipton in Yorkshire, where his father, the Reverend W. Sidgwick (d. 1841), was headmaster of the local grammar school, Ermysted's Grammar School. His mother was Mary Sidgwick, née Crofts, 1807–1879.
Henry himself was educated at Rugby (where his cousin, subsequently his brother-in-law, Edward White Benson – later Archbishop of Canterbury – was a master), and at Trinity College, Cambridge. While at Trinity, Sidgwick became a member of the Cambridge Apostles. In 1859 he was senior classic, 33rd wrangler, chancellor's medallist and Craven scholar. In the same year he was elected to a fellowship at Trinity, and soon afterwards became a lecturer in classics there, a post he held for ten years. The Sidgwick Site, home to several of the university's arts and humanities faculties in the university, is named after him.
Sir Karl Raimund Popper CH FBA FRS (28 July 1902 – 17 September 1994) was an Austrian-British philosopher and professor. He is generally regarded as one of the greatest philosophers of science of the 20th century.
Popper is known for his rejection of the classical inductivist views on the scientific method, in favour of empirical falsification: A theory in the empirical sciences can never be proven, but it can be falsified, meaning that it can and should be scrutinized by decisive experiments. He used the black swan fallacy to discuss falsification. If the outcome of an experiment contradicts the theory, one should refrain from ad hoc manoeuvres that evade the contradiction merely by making it less falsifiable. Popper is also known for his opposition to the classical justificationist account of knowledge, which he replaced with critical rationalism, "the first non-justificational philosophy of criticism in the history of philosophy."
In political discourse, he is known for his vigorous defence of liberal democracy and the principles of social criticism that he came to believe made a flourishing "open society" possible. His political philosophy embraces ideas from all major democratic political ideologies and attempts to reconcile them: socialism/social democracy, libertarianism/classical liberalism and conservatism.