Conflict may be defined as a situation of competition in which the parties are aware of the incompatibility of potential future positions, and in which each party wishes to occupy a position that is incompatible with the wishes of the other.

The World is a very complex system. It is easy to have too simple a view of it, and it is easy to do harm and to make things worse under the impulse to do good and make things better.

[on the theory of the firm] It is exactly analogous to the analysis of the reactions of a consumer by means of indifferent curves. Indeed, a consumer is merely a 'firm' whose product is 'utility.'

It is clear that the building of models is not a purely mechanical process but requires skill of a high order - not merely mathematical skill but a sensitivity to the relative importance of different factors and a critical, almost an artistic, faculty in the selection of behaviour equations which are reasonable, tentative hypotheses in explaining the behaviour of actual economies.

The organizer who creates roles, who creates the holes that will force the pegs to their shape, is a prime creator of personality itself. When we ask of a man, "What is he?" the answer is usually given in terms of his major role, job, or position in society; he is the place that he fills, a painter, a priest, a politician, a criminal.

It is absurd to suppose we can think of nature as a system apart from knowledge, for it is knowledge that is increasingly determining the course of nature.

Human artifacts not only include material structures and objects, such as buildings, machines, and automobiles, but they also include organizations, organizational structures like extended families . . . tribes, nations, corporations, churches, political parties, governments, and so on. Some of these may grow unconsciously, but they all originate and are sustained by the images in the human mind.