The human aspect of industry has changed very considerably in the last fifty years. The nature and range of these changes are still partly unknown to us, but the question of their significance is no longer in dispute. Whereas the human problems of industry were regarded until recently as lying within the strict province of the specialist, it is now beginning to be realized that a clear statement of such problems in particular situations is necessary to the effective thinking of every business administrator and every economic expert.

p. 1, Chapter 1: Fatigue; Lead paragraph - The Human Problems of an Industrial Civilisation, (1933)