Bertrand Russell was a British polymath and Nobel laureate. His work, which is spread across various fields, has had a considerable influence on philosophy, cognitive science, artificial intelligence, mathematics, linguistics, and logic. Russell is also credited with leading the revolt against idealism in Britain and is regarded as one of the founders of analytic philosophy.
Apart from co-establishing the Social Democratic Party, British politician David Owen has previously also been a practicing physician. His many important posts include that of the foreign affairs secretary of state. He has also been part of major nuclear disarmament groups and has headed the Liverpool University as its chancellor.
Ninth-century Welsh monk Asser was a close associate and biographer of the West Saxon king Alfred the Great. Nothing much is known about his early life, though he eventually rose to become the bishop of Sherborne, Dorset. Some historians have suggested his Life of King Alfred may have been a work of forgery.
Anglo-Welsh metaphysical poet Henry Vaughan was a major literary figure of the Commonwealth period and is best remembered for Silex Scintillans. While he initially studied law, the Civil War disrupted his studies and he was called back home to serve Sir Marmaduke Lloyd. He was also a practicing physician.
Welsh naturalist Thomas Pennant is remembered for his extensive research on zoology, especially ornithology. Known for his books such as British Zoology and History of Quadrupeds, he traveled to Scotland and remote parts of Britain, writing about his expeditions in his travelogues and treatises.
James Beattie was a Scottish philosopher, moralist, educator, and poet. His philosophical writings and poetry, which opposed slavery, are widely viewed as the primary source of Immanuel Kant's knowledge of David Hume. James Beattie, who was among the members that established the Royal Society of Edinburgh, is one of the 16 personalities depicted on the famous Scott Monument.
Welsh academic John Morris-Jones was closely associated with the faculty of what is now known as Bangor University. Initially a student of math, he switched his focus to Welsh language and literature later. His efforts at infusing classical standards into Welsh poetry got him knighted later.