ENDS AND MEANS engaged in manual work. This being so, it is clear that the units of self-government should be groups of the optimum size. If they are smaller than the optimum, they will fail to develop that emotional field which gives to group activity its characteristic quality, while the available quan- tity of pooled information and experience will be inadequate. If they are larger than the optimum, they will tend to split into sub-groups of the optimum size or, if the constituent individuals remain together in a crowd, there will be a danger of their relapsing into the crowd's sub-human stupidity and emotionality. The technique of industrial self-government has beenv discussed with a wealth of concrete examples in a remark- able book by the French economist, Hyacinthe Dubreuil, entitled A Chacun sa Chance. Among the writers on indus- trial organization Dubrefuil occupies a place apart; for he is almost the only one of them who has himself had experi- ence of factory conditions as a workman. Accordingly, what he writes on the subject of industrial organization carries an authority denied to the utterances of those who rely on second-hand information as a basis for their theories. Dubreuil points out that even the largest industries can be organized so as to consist of a series of self-governing, yet co-ordinated, groups of, at the outside, thirty members. Within the industry each one of such groups can act as a kind of sub-contractor, undertaking to perform so much of such and such a kind of work for such and such a sum. The equitable division of this sum among the constituent members is left to the group itself, as is also the preservation of discipline, the election of representatives and leaders. The examples which Dubreuil quotes from the annals of in- dustrial history and from his own experience as a workman tend to show that this form of organization is appreciated by the workers, to whom it gives a measure of inde- pendence even within the largest manufacturing concern, 74