[In this we may expect the article to be sold to] "the most eager buyer at a price which is just about the highest he is willing to pay, for in this case the most eager buyer does not know what prices the other buyers are willing to give [and] … each buyer fear that someone may slip in ahead of him.

Thus we seem to be on the verge of an expansion of welfare economics into something like a social science of ethics and politics: what was intended to be a mere porch to ethics is either the whole house or nothing at all. In so laying down its life welfare economics may be able to contribute some of its insights and analytical methods to a much broader evaluative analysis of the whole social process.

We have defined the main task of economic analysis as the explanation of the magnitudes of economic quantities. The student will find also that the main part of this, as of most other works on the subject, is concerned with the theory of the determination of prices, wages, interest rates, incomes, and the like. He may well inquire, therefore, in the midst of so much mathematics, whether the first task of economics is not the investigation of wealth, or welfare. Some economists have endeavored to restrict the boundaries of the science to the investigation of those quantities which are numerically measurable. Well-being, under such a restriction, would not be part of economics at all.

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[This book] is intended as a text from which the student can learn and the teacher can teach the methods and results of economic analysis. It also seeks to be a contribution to the development and systematization of the body of economic analysis itself. These purposes are not separate. The task of presenting a systematic, orderly, and accurate account of economic analysis is identical with the task of preparing the material for teaching. It must be emphasized, however, that the purpose of this work is not primarily to entertain the student, or to enable him to regurgitate appropriate material into examination books, or to learn a few pat phrases, or to indoctrinate him with an abstract discipline which he will never use. Economics is like photography in this respect, that under-exposure is less desirable than no exposure at all.

Conventions of generality and mathematical elegance may be just as much barriers to the attainment and diffusion of knowledge as may contentment with particularity and literary vagueness... It may well be that the slovenly and literary borderland between economics and sociology will be the most fruitful building ground during the years to come and that mathematical economics will remain too flawless in its perfection to be very fruitful.

The ultimate "causes of price" - to use a Classical term - lie deeply embedded in the psychology and techniques of mankind and his environment, and are as manifold as the sands of the sea. All economic analysis is an attempt to classify these manifold causes, to sort them out into categories of discourse that our limited minds can handle, and so to perceive the unity of structural relationship which both unites and separates the manifoldness. Our concepts of "" and "supply" are such broad categories. In whatever sense they are used, they are not ultimate determinants of anything, but they are convenient channels through which we can classify and describe the effects of the multitude of determinants of the system of economic magnitude.

We are not sent into this world to walk it in solitude. We are born to love, as we are born to breathe and eat and drink. The babe is hardly separated from his mother’s womb before he stretches out a tiny clasping hand, and from that time forth he will constantly stretch out to touch the world that lies about him and the folk that dwell therein. The purpose of our growth in life is to bring us into unity with the universe into which we are born, to make us aware that we are not lonely individual meteors hurtling blindly through an abysmal dark, but living parts of a living whole. As we grow we learn to love more and more: first ourselves; then the family within the small kingdom of the home; then the school, the wider circle of friends, the home community, the college, and the still wider community of the nation; and finally, the greatest country of all, which has no boundaries this side of Hell, and perhaps not even there.