John Kenneth Galbraith (October 15, 1908 – April 29, 2006), also known as Ken Galbraith, was a Canadian-American economist, diplomat, public official and intellectual. A leading proponent of 20th-century American liberalism, his books on economic topics were bestsellers from the 1950s through the 2000s. As an economist, he leaned toward post-Keynesian economics from an institutionalist perspective.Galbraith was a long-time Harvard faculty member and stayed with Harvard University for half a century as a professor of economics. He was a prolific author and wrote four dozen books, including several novels, and published more than a thousand articles and essays on various subjects. Among his works was a trilogy on economics, American Capitalism (1952), The Affluent Society (1958), and The New Industrial State (1967). Some of his work has been criticized by economists Milton Friedman, Paul Krugman, Robert Solow, and Thomas Sowell.