Which phrase was used by economist John Kenneth Galbraith to describe the prosperity of the 1950s? "baby boom generation" "postwar years" "expanding middle class" "affluent society

Answer: the affluent society.

The Affluent Society is a book by economist John Kenneth Galbraith, in which he describes the way in which the United States' economy operated in the 1950s. He argues that the country became wealthy in the private sector but poor in the public sector. Galbraith argued that the government needed to invest on social infrastructure using funds from taxation if it wanted to remain ahead.

The 'affluent society" was used by economist John Kenneth Galbraith to describe the prosperity of the 1950s.