The solution would seem rather to lie in seeing to it that suggestion always acts on the side of reason; if rationality were once to become really respectable, if we feared the entertaining of an unverifiable opinion with the warmth with which we fear using the wrong implement at the dinner table, if the thought of holding a prejudice disgusted us as does a foul disease, then the dangers of man’s suggestibility would be turned into advantages. We {46} have seen that suggestion already has begun to act on the side of reason in some small part of the life of the student of science, and it is possible that a highly sanguine prophetic imagination might detect here a germ of future changes. Again, a fourth corollary of gregariousness in man is the fact expounded many years ago by Pearson that human altruism is a natural instinctive product. The obvious dependence of the evolution of altruism upon increase in knowledge and inter-communication has led to its being regarded as a late and a conscious development—as something in the nature of a judgment by the individual that it pays him to be unselfish. This is an interesting rationalization of the facts because in the sense in which “pay” is meant it is so obviously false. Altruism does not at present, and cannot, pay the individual in anything but feeling, as theory declares it must. It is clear, of course, that as long as altruism is regarded as in the nature of a judgment, the fact is overlooked that necessarily its only reward can be in feeling. Man is altruistic because he must be, not because reason recommends it, for herd suggestion opposes any advance in altruism, and when it can the herd executes the altruist, not of course as such but as an innovator. This is a remarkable instance of the protean character of the gregarious instinct and the complexity it introduces into human affairs, for we see one instinct producing manifestations directly hostile to each other—prompting to ever advancing developments of altruism, while it necessarily leads to any new product of advance being attacked. It shows, moreover, as will be pointed out again later, that a gregarious species rapidly developing a complex society can be saved from inextricable confusion only by the appearance of reason and the application of it to life. {47} When we remember the fearful repressing force which society has always exercised on new forms of altruism and how constantly the dungeon, the scaffold, and the cross have been the reward of the altruist, we are able to get some conception of the force of the instinctive impulse which has triumphantly defied these terrors, and to appreciate in some slight degree how irresistible an enthusiasm it might become if it were encouraged by the unanimous voice of the herd. In conclusion we have to deal with one more consequence of the social habit in man, a consequence the discussion of which involves some speculation of a necessarily quite tentative kind.