FIELD STUDIES ON FERTILITY OF HUMAN POPULATIONS
JOHN B. WYON, M.D., B.Ch., M.PH.
RONALD FREEDMAN, Ph.D.
Chairman: Frederick L. Hisaw, Ph.D.
DR. HISAW, in opening the Session, commented that the survival of a species today, regardless of what species, depends upon two factors: upon nature and upon the whims of man. "We have many examples of the works of nature in such matters, and the fossil remains of numerous species are good testimonies to its effectiveness. Nature's processes are certain, ruthless, unemotional, impartial and as sure as death. We know the way nature solves its problems. The influence of man, or rather the intervention of intellect, is a recent innovation, biologically speaking. On the one hand this influence has led to extinctions of species; on the other, some species have met with man's favor and have prospered (if we can think of domestication as prospering). Still other species have met man's fancy and have been protected in reservations or preserves, and a great number of species have not yet even come to man's attention.