In 1935 George Bernard Shaw received a letter from John Maynard Keynes in which Keynes asserted,
" I believe myself to be writing a book on economic theory,which will largely revolutionize... the way the world thinks about economic problem". And, in fact,Keynes's The general theory of employment, interest and money (1936)did revolutionize economic analysis and established Keynes as one of the most influential economists of all time.