ARE THE EFFECTS OF USE AND DISUSE INHERITED? AN EXAMINATION OF THE VIEW HELD BY SPENCER AND DARWIN. BY WILLIAM PLATT BALL. NEW YORK: THE HUMBOLDT PUBLISHING CO., 28 LAFAYETTE PLACE. 30 INVERSE INHERITANCE, . PREFACE. My warmest thanks are due to Mr. Francis Darwin, to Mr. E. B. Poulton (whose interest in the subject here discussed is shown by his share in the translation of Weismann's "Essays on Heredity "), and to Professor Romanes for the help afforded by their kindly suggestions and criticisms, and for the advice and recommendation under which this essay is now published. Encouragement from Mr. Francis Darwin is to me the more precious and the more worthy of grateful recognition from the fact that my general conclusion that acquired characters are not inherited is at variance with the opinion of his revered father, who aided his great theory by the retention of some remains of Lamarck's doctrine of the inherited effect of habit. I feel as if the son, as representative of his great progenitor, were carrying out the idea of an appreciative editor who writes to me: "We must say that, if Darwin were still alive, he would find your arguments of great weight, and undoubtedly would give to them the serious consideration which they deserve." I hope, then, that I may be acquitted of undue presumption in opposing a view sanctioned by the author of the "Origin of Species," but already stoutly questioned and firmly rejected by such followers of his as Weismann, Wallace, Poulton, Ray Lankester, and others, to say nothing of its practical rejection by so great an authority on heredity as Francis Galton. The sociological importance of the subject has already been insisted on in emphatic terms by Mr. Herbert Spencer, and this importance may be even greater than he imagined. Civilization largely sets aside the harsh but ultimately salutary action of the great law of natural selection without providing an efficient substitute for preventing degeneracy. The substitute on which moralists and legislators rely, if they think on the matter at all, is the cumulative inheritance of the beneficial effects of education, training, habits, institutions, and so forth-the inheritance, in short, of acquired |