SPECULATIONS UPON THE HUMAN MIND IN 1915

that in a species such as man, owing to the freedom from the direct action of natural selection within the major unit, the individual’s capacity for varied reaction to his environment has undergone an enormous development, while at the same time the capacity for inter­com­mun­i­ca­tion—upon which the co-ordination of the major unit into a potent and frictionless mechanism depends—has lagged far behind. The term “inter­com­mun­i­ca­tion” is here used in the very widest sense to indicate the ties that bind the individual to his fellows and them to him. It is not a very satisfactory word; but as might be expected in attempting to express a series of functions so complex and so unfamiliar to generalization, it is not easy to find an exact expression ready made. Another phrase applicable to a slightly different aspect of the same function is “herd accessibility,” which has the advantage of suggesting by its first constituent the limitation, primitively at any rate, an essential part of the capacities it is desired to denote. The conception of herd accessibility includes the specific sensitiveness of the