It is appropriate at the outset of this discussion to consider the reasons for and the effect of the division of work. It is sufficient for our purpose to note the following factors.

Because men differ in nature, capacity and skill, and gain greatly in dexterity by specialization | Because the same man cannot be at two places at the same time | Because one man cannot do two things at the same time | Because the range of knowledge and skill is so great that a man cannot within his life-span know more than a small fraction of it. In other words, it is a question of human nature, time, and space. | In a shoe factory it would be possible to have 1,000 men each assigned to making complete pairs of shoes... | p. 3 ; on the division of work