Marxists are ready to sacrifice the political liberties of individuals in order to change the existing economic order. So are Fascists and Nazis. Tha… - John Maynard Keynes

Like the monetarist Milton Friedman, Keynes looked to price stability as a way to shore up classical economic thinking. For the most part, he believed, laissez-faire economics worked. Supply and demand did bring society to a prosperous equilibrium. They just needed a few pieces of basic economic architecture to work: property rights, the rule of law, and price stability. But unlike Friedman, Keynes had arrived at monetarism as a creative way to expand the power of the state to fight the uncertainties and anxieties of postwar life.

Economics is a science of thinking in terms of models joined to the art of choosing models which are relevant to the contemporary world. It is compelled to be this, because, unlike the typical natural science, the material to which it is applied is, in too many respects, not homogeneous through time. The object of a model is to segregate the semi-permanent or relatively constant factors from those which are transitory or fluctuating so as to develop a logical way of thinking about the latter, and of understanding the time sequences to which they give rise in particular cases.
Good economists are scarce because the gift for using "vigilant observation" to choose good models, although it does not require a highly specialised intellectual technique, appears to be a very rare one.

Capitalism... is absolutely irreligious, without internal union, without much public spirit, often... a mere congeries of possessors and pursuers. Such a system has to be immensely, not merely moderately, successful to survive.