Hitherto we have discussed the place of land, labor, and capital in production, and the share of distribution going to each, as if these factors were guided in their work by internal forces. Both land and capital are stone blind. Workers, too, need direction. Some one must anticipate probable demands, determine the relative amount of each factor to employ in production, and provide for supplies of raw materials. In other words, there is a productive function apart from land, labor, and capital. Consequently, there has developed in modern industrial society a group of men who devote their time and abilities to performing this function. Such men we call enterprisers. Every business man, in fact, no matter how large or how small his operation, is necessarily an enterpriser.