6. As has been intimated, it is only by application of principles underlying political economy that we come to the conditions of the highest production, or, in other words, find how to satisfy the largest range of desires to the greatest extent at the smallest cost of labor. One of the chief means of effecting this is by _the combination and division of labor_. Recalling what was said concerning association and individuality, we shall see what principles are involved here, and how naturally they came into operation. As there was seen to be no antagonism between the two latter conceptions when carefully analyzed, so there is none, but rather the opposite, between combination and division of labor. It is true that there are instances where combination may take place without division, as when men unite to effect purposes which one could not accomplish except in much more than the proportionate time; as also in some cases to affect purposes which the individual could not effect in any length of time, such as the moving and placing of heavy timbers and stones, the management of ships and railway trains, etc. But for the most part men divide their labor in the process in order that they may combine the result. This is done in two ways: (1) Men divide up the work of supplying human wants into different trades and occupations, according to their several tastes and aptitudes. Each man needs nearly the same that every other needs. But while each provides for only one kind of want, he provides more than enough to satisfy his own desire in that particular respect, and contributes the overplus to meet that same want in others. As all others do the same, each is contributing to meet the desires of one and all to each. The shoemaker, the tailor, the carpenter, the cabinet-maker, the blacksmith, the weaver, the paper-maker, the tin-man, the miner, the smelter, the painter, the glazier, etc., are all contributing to supply the farmer’s needs, and the farmer is contributing to all their needs. The wants of all are many times more fully met in this way than if each one should undertake to supply all his own wants.