Alfred Marshall (born 26 July 1842 in Bermondsey, London, England, died 13 July 1924 in Cambridge, England) was an English economist and one of the most influential economists of his time. His book, Principles of Economics (1890), brings the ideas of supply and demand, of marginal utility and of the costs of production into a coherent whole. It became the dominant economic textbook in England for a long period.