Note 20 — Chapter V · THE BIO-SOCIOLOGISTS.
Henry P. (Henry Pomeroy) Horton translation
This is what Dr. Näcke says of the causes of this individual factor: “Indeed it is even probable that in the last analysis the individual factor is dependent upon the environment, since this so influenced the parents, grandparents, etc. that the germ of the next generation must have been injured directly or later through corrupted blood or narrow pelvis on the part of the mother (both again dependent upon the environment).”20