towns in war; and the variety of occupations moulds similar men into the varied embodiments of a hundred professions and trades. There is, again, a "Multiplication of Effects": one cause may produce a vast variety of results, and help to differentiate the world; a word amiss, like Marie Antoinette's, or an altered telegram at Ems, or a wind at Salamis, may play an endless rôle in history. And there is the law of "Segregation": the parts of a relatively homogeneous whole, being driven separate into different areas, are shaped by diverse environments into dissimilar products,—as the English become Americans, or Canadians, or Australians, according to the genius of the place. In these many ways the forces of nature build the variety of this evolving world.
But finally, and inescapably, comes "Equilibration." Every motion, being motion under resistance, must sooner or later come to an end; every rhythmic oscillation (unless externally reinforced) suffers some loss of rate and amplitude. The planets ride through a lesser orbit, or will ride, than once they rode; the sun will shine less warmly and brightly as the centuries pass away; the friction of the tides will retard the rotation of the earth. This globe, that throbs and murmurs with a million motions, and luxuriates into a million forms of riotously breeding life, will some day move more leisurely in its orbit and its parts; the blood will run cooler and more slowly in our dessicated veins; we shall not hurry any more; like dying races, we shall think of heaven in terms of rest and not of life; we shall dream of Nirvana. Gradually, and then rapidly, equilibration will become dissolution, the unhappy epilogue of evolution. Societies will disintegrate, masses will migrate, cities will fade into the dark hinterland of peasant life; no government will be strong enough to hold the loosened parts together; social order will cease to be even remembered. And in the individual too, integration will give way to disruption; and that coördination which is life will pass into that diffuse disorder which is death. The earth will be a chaotic
