John Kenneth Galbraith, 97

Mr. Galbraith was one of the most widely read authors in the history of economics; among his 33 books was “The Affluent Society” (1958), one of those rare works that forces a nation to re-examine its values. He wrote fluidly, even on complex topics, and many of his compelling phrases — among them “the affluent society,” “conventional wisdom” and “countervailing power” — became part of the language.