- Thomas Wright
- Albert Einstein
- Upton Sinclair
- Charles Nordmann
- Immanuel Kant
- Alice M. Diehl
- John Playfair
- J. M. Woodman
- C. G. Jung
- Sir Edward Bagnall Poulton
- Carl E. Gardner
- August Weismann
- August Weismann
- W. Whately Smith
- Bernard Bosanquet
- baron Georges Cuvier
- Victor Alvin Ketcham
- Gustaf Björklund
- James V. McConnell
- John Dewey
- Lee Wallot
- Arthur Crump
- Duncan Black MacDonald
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- Wilbur Gleason Zeigler