- Elizabeth Blackwell
- Elizabeth Blackwell
- Alice S. Cheyney
- Emory S. Bogardus
- Randolph Silliman Bourne
- H. J. Fleure
- Georges Palante
- Randolph Silliman Bourne
- James Augustus St. John
- Nels Anderson
- M. Moncalm
- H. G. Wells
- Daniel G. Brinton
- Sir E. Ray Lankester
- J. Howard Moore
- Robert Ezra Park
- Georg Simmel
- Walter F. Willcox
- Herbert Spencer
- Bertrand Russell
- Edward Westermarck
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- Arthur M. Lewis
- Émile Durkheim
- Franz Oppenheimer
- Bronislaw Malinowski
- Jean-Marie Guyau
- James Owen Dorsey
- John Berry Haycraft
- Richard Baxter