And there is something more. We are all going to mingle our blood again. We cannot keep ourselves apart; the worst enemies will some day come to the Peace of Verona. All the Montagues and Capulets are doomed to intermarry. A time will come in less than fifty generations when all the population of the world will have my blood, and I and my worst enemy will not be able to say which child is his or mine. But you may retort--perhaps you may die childless. Then all the sooner the whole species will get the little legacy of my personal achievement, whatever it may be. You see that from this point of view--which is for me the vividly true and dominating point of view--our individualities, our nations and states and races are but bubbles and clusters of foam upon the great stream of the blood of the species, incidental experiments in the growing knowledge and consciousness of the race. I think this real solidarity of humanity is a fact that is only slowly being apprehended, that it is an idea that we who have come to realize it have to assist in thinking into the collective mind. I believe the species is still as a whole unawakened, still sunken in the delusion of the permanent separateness of the individual and of races and nations, that so it turns upon itself and frets against itself and fails to see the stupendous possibilities of deliberate self-development that lie open to it now. I see myself in life as part of a great physical being that strains and I believe grows towards beauty, and of a great mental being that strains and I believe grows towards knowledge and power. In this persuasion that I am a gatherer of experience, a mere tentacle that arranges thought beside thought for this being of the species, this being that grows beautiful and powerful, in this persuasion I find the ruling idea of which I stand in need, the ruling idea that reconciles and adjudicates among my warring motives. In it I find both concentration of myself and escape from myself; in a word, I find Salvation. 2.9. INDIVIDUALITY AN INTERLUDE. I would like in a parenthetical section to expand and render rather more concrete this idea of the species as one divaricating flow of blood, by an appeal to its arithmetical aspect. I do not know if it has ever occurred to the reader to compute the number of his living ancestors at some definite date, at, let us say, the year one of the Christian era. Everyone has two parents and four grandparents, most people have eight great-grandparents, and if we ignore the possibility of intermarriage we shall go on to a fresh power of two with every generation, thus:-- Column 1: Number of generations. Column 2: Number of ancestors. 3: 8 4: 16 5: 32 7: 128 10: 1,024 20: 126,976 30: 15,745,024 40: 1,956,282,976