The tourist business is a trap, it is a tained honey; Man clearly should have stayed in bed, and not invented money.

Deciding under uncertainty is bad enough, but deciding under an illusion of certainty is catastrophic.

[The historical] development in the international system may almost be defined as the process by which we pass from stable war to stable peace.

Equilibrium is a figment of the human imagination.

Humble, honest, ignorance is one of the finest flowers of the human spirit

One advantage of exhibiting a hierarchy of systems in this way is that it gives us some idea of the present gaps in both theoretical and empirical knowledge. Adequate theoretical models extend up to about the fourth level, and not much beyond. Empirical knowledge is deficient at practically all levels.

We should always bear in mind that numbers represent a simplification of reality.