At the First National Conference on Race Betterment (1914) Harry Laughlin presented a plan to eliminate "the great mass of defectiveness...menacing our national efficiency and happiness." His calculations assumed that the lowest 10 percent of "human stock" was so poorly prepared for civilization that its survival represented a "social menace." By Laughlin's calculations, a systematic program to purify the human "breeding stock" would require fifteen million sterilizations over approximately sixty-five years.
Laughlin, Harry H., "Calculations on the Working Out of a Proposed Program of Sterilization" (2009). Buck v Bell Documents. Paper 77.