Coercion is evil precisely because it thus eliminates an individual as a thinking and valuing person and makes him a bare tool in the achievement of … - F.A. Hayek

Few people ever have an abundance of choice of occupation. But what matters is that we have some choice, that we are not absolutely tied to a job which has been chosen for us, and that if one position becomes intolerable, or if we set our heart on another, there is always a way for the able, at some sacrifice, to achieve his goal. Nothing makes conditions more unbearable than the knowledge that no effort of ours can change them; and even if we should never have the strength of mind to make the necessary sacrifice, the knowledge that we could escape if we only strove hard enough makes many otherwise intolerable positions bearable.

Complete rationality of action in the Cartesian sense demands complete knowledge of all the relevant facts. A designer or engineer needs all the data and full power to control or manipulate them if he is to organize the material objects to produce the intended result. But the success of action in society depends on more particular facts than anyone can possibly know. And our whole civilization in consequence rests, and must rest, on our believing rnuch that we cannot know to be true in the Cartesian sense.

This is not the place to discuss how this change in outlook was fostered by the uncritical transfer to the problems of society of habits of thought engendered by the preoccupation with technological problems, the habits of thought of the natural scientist and the engineer, and how these at the same time tended to discredit the results of the past study of society which did not conform to their prejudices and to impose ideals of organization on a sphere to which they are not appropriate.