Little of the old establishment survives in modern industry: the emphasis is upon change and adaptability; the rate of change mounts to an increasing tempo. We have in fact passed beyond that stage of human organisation in which effective communication and collaboration were secured by established routines of relationship. For this change, physico-chemical and technical development are responsible. It is no longer possible for an industrial society to assume that the technical processes of manufacture will exist unchanged for long in any type of work. On the contrary, every industry is constantly seeking to change, not only its methods, but the very materials it uses; this development has been stimulated by the war.