David Ricardo (1772-1823) was a renowned British economist known for his significant contributions to classical economics. Born into a Sephardic Jewish family, he started his career as a stockbroker and eventually became one of the most influential economists of his time. Ricardo is best known for his theory of comparative advantage, which revolutionized international trade theory. He also made important contributions to the theory of rent and the labor theory of value. His seminal work, "Principles of Political Economy and Taxation," published in 1817, solidified his reputation as a leading economist. Ricardo's ideas continue to shape economic thought and policy to this day.