Richard Price

The Reverend Richard Price FRS
Portrait of Dr Richard Price (1784), by Benjamin West
Born	(1723-02-23)23 February 1723 Tynton, Llangeinor, Glamorgan
Died	19 April 1791(1791-04-19) (aged 68) Newington Green, London
Known for	Bayes–Price theorem
Signature

Richard Price FRS (23 February 1723 – 19 April 1791) was a Welsh moral philosopher, Nonconformist minister and mathematician. He was also a political reformer and pamphleteer, active in radical, republican, and liberal causes such as the French and American Revolutions. He was well-connected and fostered communication between many people, including Thomas Jefferson, John Adams, George Washington, Mirabeau and the Marquis de Condorcet. According to the historian John Davies, Price was "the greatest Welsh thinker of all time".^[1]

Born in Llangeinor, near Bridgend, Wales, Price spent most of his adult life as minister of Newington Green Unitarian Church, on the then outskirts of London, England. He edited, published and developed the Bayes–Price theorem and the field of actuarial science. He also wrote on issues of demography and finance, and was a Fellow of the Royal Society.