Unlike the old New Deal, which was a response to a severe financial and economic calamity, the Great Society initiatives came during a period of rapid economic growth. Kennedy proposed an across-the-board tax cut lowering the top marginal income tax rate in the United States by 20%, from 91% to 71%, which was enacted in February 1964, three months after Kennedy's assassination, under Johnson. The tax cut also significantly reduced marginal rates in the lower brackets as well as for corporations. The gross national product rose 10% in the first year of the tax cut, and economic growth averaged a rate of 4.5% from 1961 to 1968.
Johnson's tax cut measure triggeredJohn Kenneth Galbraith published a new edition of The Affluent Society, the average income of the American family stood at $8,000, double what it had been a decade earlier.
what one historian described as "the greatest prosperity of the postwar years." GNP increased by 7% in 1964, 8% in 1965, and 9% in 1966. The unemployment rate fell below 5%, and by 1966 the number of families with incomes of $7,000 a year or more had reached 55%, compared with 22% in 1950. In 1968, when