Kenneth Arrow (1921-2017)

Kenneth Arrow was a leading American economist, political theorist and polymath. One of the most influential economists of his generation, Arrow won the Nobel Prize in Economics in 1972, sharing it with John Hicks.
Famous for his Impossibility Theorem, Arrow theorised that it was impossible to formulate a social preference ordering that satisfied a number of conditions. His theorem has significant relevance for political voting, welfare economics and social choice theory