So that on such altruistic actions as are implied, firstly in being just, secondly in seeing justice done between others, and thirdly, in upholding and improving the agencies by which justice is administered, depend, in large measure, the egoistic satisfactions of each. § 78. But the identification of personal advantage with the advantage of fellow-citizens is much wider than this. In various other ways the well-being of each rises and falls with the well-being of all. A weak man left to provide for his own wants, suffers by getting smaller amounts of food and other necessaries than he might get were he stronger. In a community formed of weak men, who divide their labors and exchange the products, all suffer evils from the weakness of their fellows. The quantity of each kind of product is made deficient by the deficiency of laboring power; and the share each gets for such share of his own product as he can afford to give, is relatively small. Just as the maintenance of paupers, hospital patients, inmates of asylums, and others who consume but do not produce, leaves to be divided among producers a smaller stock of commodities than would exist were there no incapables; so must there be left a smaller stock of commodities to be divided, the greater the number of inefficient producers, or the greater the average deficiency of producing power. Hence, whatever decreases the strength of men in general restricts the gratifications of each by making the means to them dearer. More directly, and more obviously, does the bodily well-being of his fellows concern him; for their bodily ill-being, when it takes certain shapes, is apt to bring similar bodily ill-being on him. If he is not himself attacked by cholera, or small-pox, or typhus, when it invades his neighborhood, he often suffers a penalty through his belongings. Under conditions spreading it, his wife catches diphtheria, or his servant is laid up with scarlet fever, or his children take now this and now that infectious disorder. Add together the immediate and remote evils brought on him year after year by epidemics, and it becomes manifest that his egoistic satisfactions are greatly furthered by such altruistic activities as render disease less prevalent.