[1] Inspired by William Vogt’s book Road to Survival, Moore started to work outside his business, using his fortune and expertise to support the development of transatlantic structures facilitating international peace and influence population discourse and policy for the primary purpose of decreasing the number of humans.
[3] He was founding member of the Committee to Defend America by Aiding the Allies in 1940; chairman of the executive committee of the US League of Nations Association from 1940 to 1943 and president of Americans United for World Organisation, 1944.
[citation needed] He served as treasurer of the Committee for the Marshall Plan in 1948.
[citation needed] Moore was Chairman of the Board of the Population Reference Bureau, vice-president of International Planned Parenthood Federation in 1964, president of the Association for Voluntary Sterilization from 1964 to 1969, and cofounder of the Population Crisis Committee in 1965.
[citation needed] Hugh Moore received an honorary degree of Humane Letters from Lafayette College in 1961.