Some services give pleasure to the renderer, and therefore involve no disutility. But there is a point beyond which even pleasurable productive activities become irksome ; and most forms of work, regularly pursued, involve some disutility, the degree of which varies with the conditions under which the work is done, the sense of worthwhilenessin themindofthe doer, and the opportunity for the exercise of skill and display of prowess which the work affords. The point at which the disutility exceeds the utility created by the work depends also on the opportunities open to the worker for the enjoyment of leisure and on his capacity to take advantage of them. Pleasurable activities which do not contribute to the satisfaction of human wants fall outside the economic field; but it may be desirable to make provision for them in certain cases on an economic basis where they cannot be easily distinguished from similar activities which do contribute to the satisfaction of human wants-e.g. in the case of artists.. In general, however, the worthwhileness of human activities must be estimated in relation to their capacity to satisfy wants, measured against the using
2. The first principle to be observed in according priority to some wants over others is that, subject to the qualifications stated in later propositions, every human being has equal rights. Accordingly, the basic needs common to all men should receive first priority, together with those special needs which, differing from person to person or from group to group, are indispensable to the ensuring of a national (or worldwide) minimum standard of living.