Thus we lead a wider life; and yet it is also true that there is demanded of us a more distinct specialization than has been required in the past. The complexity of society takes the form of organization, that is of a growing unity and breadth sustained by the co-operation of differentiated parts, and the man of the age must reflect both the unity and the differentiation; he must be more distinctly a specialist and at the same time more a man of the world. It seems to many a puzzling question whether, on the whole, the breadth or the specialization is more potent in the action of modern life upon the individual; and by insisting on one aspect or the other it is easy to frame an argument to show either that personal life is becoming richer, or that man is getting to be a mere cog in a machine.[30] I think, however, that these two tendencies are not really opposite but complementary; that it is not a case of breadth _versus_ specialization, but, in the long run at least, of breadth _plus_ specialization to produce a richer and more various humanity. There are many evils connected with the sudden growth in our day of new social structures, and the subjection of a part of the people to a narrow and deadening routine is one of them, but I think that a healthy specialization has no tendency to bring this about. On the contrary, it is part of a liberating development. The narrow specialist is a bad specialist; and we shall learn that it is a mistake to produce him. In an organized life isolation cannot succeed, and a right specialization does not isolate. There is no such separation between special and general knowledge or efficiency as is sometimes supposed. In what does the larger knowledge of particulars consist, if not in perceiving their relation to wholes? Has a student less general knowledge because he is familiar with a specialty, or is it not rather true that in so far as he knows one thing well it is a window through which he sees things in general?