Byline: THE WASHINGTON TIMES John Kenneth Galbraith, a Harvard economist and public intellectual who arguably was the most aggressive and prolific advocate of American liberalism throughout the second half of the 20th century, died over the weekend at the age of 97. His was truly the fullest of lives - and the least of it was its longevity, though that, too, was enormously impressive. From 1952, when he published his first of dozens of institutionalist books ("American Capitalism: The Concept of Countervailing Power") through 2004, Mr. Galbraith had authored more than three dozen books, incl...