I had, to be sure, been drawn into economics when the General Theory was an exciting revelation for students hungry for explanation and remedy of the… - James Tobin

The important Keynesian insight is that a high propensity to save will not generate high national saving unless it goes into investment, into accumulation of real capital. The "paradox of thrift" makes this point in an extreme way. In certain circumstances, when there is no demand for investment around, the economy can be no better off, or even worse off, if a thrifty public cuts consumption.

The historic terrain of macro-economic theory is the explanation of the levels and fluctuations of overall economic activity. Macro-economists have been especially interested in the effects of alternative fiscal, financial, and monetary policies.

A long decade ago economic growth was the reigning fashion of political economy. It was simultaneously the hottest subject of economic theory and research, a slogan eagerly claimed by politicians of all stripes, and a serious objective of the policies of governments. The climate of opinion has changed dramatically. Disillusioned critics indict both economic science and economic policy for blind obeisance to aggregate material "progress," and for neglect of its costly side effects. Growth, it is charged, distorts national priorities, worsens the distribution of income, and irreparably damages the environment. Paul Erlich speaks for a multitude when he says, "We must acquire a life style which has as its goal maximum freedom and happiness for the individual, not a maximum Gross National Product."