References
- de Condorcet , Marquis Jean . 1960 . “ Outline of an historical view of the progress of the human mind. ” . In The Development of Civilization , Edited by: Carrol , Harry J. Jr. Vol. 2 , Chicago : Scott, Foresman, and Company .
- Galton , Francis . 1962 . Hereditary genius. , Cleveland : World Publishing Co. .
- Gumplowicz , Ludwig . 1883 . Rassenkampf Berlin
- Himmelfarb , Gertrude . 1959 . Darwin and the Darwinian revolution. , Garden City : Doubleday Anchor .
- Hofstadter , Richard . 1945 . Social Darwininism in American thought. , Philadelphia : Univ. of Pennsylvania Press .
- Mayer , Jean . Summer 1969 . Towards a non‐Malthusian population policy. , Summer , New York , New York : Columbia Forum .
- Malthus , Thomas Robert . 1960 . An essay on the principle of population. , Everyman edition , New York : Random House .
- Ratzenhofer , Gustav . 1898 . Sociologische Erkenntness Berlin
- Ward , Lester . 1883 . Dynamic sociology , New York : D. Appleton and Co. .
- _____ . 1903 . Pure sociology. , New York : Macmillan .