[Sidenote: Wants grow refined as wealth advances] It is a suggestive fact that civilized man, equipped with all of the inventions and the advantages of science, spends more hours of effort in gaining a livelihood than does the savage with his almost unaided hands. Activity is dependent not on bare physical necessity, but on developed wants--in the economic sense of the term. Such social institutions as property and inheritance owe their origin and their justification to their average effect on the motives to activity. If society is to develop, if progress is to continue, human wants--not of the grosser sort, but ever more refined--must continue to emerge and urge men to action. § II. DESIRES FOR NON-MATERIAL ENDS, AS SECONDARY ECONOMIC MOTIVES [Sidenote: The real man in economics] 1. _The spiritual nature of man must not be ignored in economic reasoning._ There has been much and just criticism of the earlier writers and of their conclusions because so little account was taken by them of any but the motive of self-interest in economic affairs. Generally it was assumed that men knew their own interest, and sought in a very unsympathetic way those things which would gratify their material wants. Thus man in economic reasoning was made an abstraction, differing from real men in his lack of manifold spiritual and social elements. [Sidenote: Desires for the non-material may become economic motives] 2. _The main classes of non-material wants that are secondarily economic are fear of temporal punishment; sentiments of moral and religious duty; pride, honor, and fear of disgrace; and pleasure in work for itself, for social approval, or for a social result._ The first is best illustrated by slavery, where the slave is not impelled to seek wealth for his own welfare, but is driven by punishment to perform the task. The object is to create within the mind of the slave a motive that will take the place of the ordinary economic motive. The feeling of religious or moral duty leads men to act often in direct opposition to the usual economic motive. The taboo is faithfully observed by the members of a savage tribe who suffer as a result the severest hardships. A religious injunction prevents the use of food that would save from starvation. Pride, either of family or of calling; the soldier's honor leading him to sacrifice not only his future but his life; the love of social approval, holding men to the most disagreeable tasks--these illustrate how strongly social sentiments oppose the narrower motive of immediate self-interest as generally thought of. Pleasure in work for work's sake, and pride in the result, may act as motives quite as strong in some cases as desire for the product that can be used. And even where this does not change the kind of work done, it comes in to influence the interest and earnestness with which the work is performed. [Sidenote: Economists must overlook no influence on value]