[2] The conference was truly international, with one hundred and twenty-three delegates from Argentina, Austria, Belgium, Brazil, Chile, China, Czechoslovakia, Denmark, Estonia, Finland, France, Germany, Great Britain, Greece, the Netherlands, India, Italy, Japan, Norway, Peru, Poland, Siam, Spain, the Soviet Union, Sweden, Switzerland, and the United States.
British Malthusian leader Charles Vickery Drysdale noted that the meeting was "devoid of propagandism," and that the "weight of authority at it has surpassed all the previous gatherings, and has been second to none in brilliance.
The simple fact that nearly two hundred persons of the highest eminence in biological, economic and statistical science, sociologists, statesmen, and physicians have come from all parts of the world to Geneva to confer on this question is sufficient to show that it cannot be disregarded and that it will have to be considered by the Governments of all countries.
[6] She conceived the World Population Conference and organized a group of scientists including Raymond Pearl, Edward Murray East, and Clarence Cook Little, to develop the program and invite speakers.
Sanger's staff quit in protest; however she was able to persuade most back, arguing that the meeting was more important than who was credited, and agreed that the program be printed without mention of the women's names (including her own).