David Ricardo (18 April 1772 - 11 September 1823) was a British political economist, one of the most influential of the classical economists along with Thomas Malthus, Adam Smith and James Mill. Born in London, England, Ricardo was the third of 17 children of a Sephardic Jewish family of Portuguese origin who had recently relocated from the Dutch Republic. His father, Abraham Ricardo, was a successful stockbroker. He began working with his father at the age of 14. At age 21, Ricardo eloped with a Quaker, Priscilla Anne Wilkinson, and, against his father's wishes, converted to the Unitarian faith. This religious difference resulted in estrangement from his family, and he was led to adopt a position of independence. His father disowned him and his mother apparently never spoke to him again.