I am now profoundly convinced of what I had only hinted at before, namely, that the struggle between the advocates of a free society and the advocate… - Friedrich Hayek

All the paradigms of culturally evolved institutions, morals, exchange, and money refer to such practices whose benefits transcend the individuals who practice them in the particular instances. The result is that whole groups may be helped by them to expand into what I shall call extended orders, through the effects of practices of which the individuals are not aware. Such practices can lead to the formation of orderly structures far exceeding the perception of those whose actions produce them. They make possible the adaptation of such actions to unknown circumstances and lead to the formation of an indefinitely expansible order which can develop only through group selection, that is, a selection of groups for common attributes possessed by them.

A limited democracy might indeed be the best protector of individual liberty and be better than any other form of limited government, but an unlimited democracy is probably worse than any other form of unlimited government, because its government loses the power even to do what it thinks right if any group on which its majority depends thinks otherwise. If Mrs. Thatcher said that free choice is to be exercised more in the market place than in the ballot box, she has merely uttered the truism that the first is indispensable for individual freedom, while the second is not: free choice can at least exist under a dictatorship that can limit itself but not under the government of an unlimited democracy which cannot.

The social sciences building at the University of Chicago indeed still bears since it was built 40 years ago on its outside an inscription taken from the famous physicist Lord Kelvin: "When you cannot measure, your knowledge is meager and unsatisfactory." I will admit that that may be true, but it is certainly not scientific to insist on measurement where you don't know what your measurements mean. There are cases where measurements are not relevant. What has done much damage to microeconomics is striving for a pseudo-exactness by imitating methods of the physical sciences which have to deal with what are fundamentally much more simple phenomena. And the assumption that it is possible to ascertain all the relevant particular facts still completely dominates the alternative methods of dealing with our constitutional ignorance, which economists have tried to overcome. This of course, is what has come to be called macroeconomics as distinct from microeconomics.