constructive imagination of Swift.
Setting aside such guesses and confining ourselves to the facts, we may say in summary that we find the infrahuman mammalia to present two distinctly separable strains of the social habit. Both are of great value to the species in which they appear, and both are associated with certain fundamentally similar types of reactive capacity which give a general resemblance of character to all gregarious animals. Of the two forms the protective is perhaps capable of absorbing more fully the personality of the individual than is the aggressive, but both seem to have reached the limit of their intensification at a grade far lower than that which has been attained in the insects.
C HARACTERS OF THE G REGARIOUS A NIMAL D ISPLAYED BY M AN.
When we come to consider man we find ourselves faced at once by some of the most interesting problems in the biology of the social habit. It is probably not necessary now to labour the proof of the fact that man is a gregarious animal in literal fact, that he is as essentially gregarious as the bee and the ant,