Enrico Ferri
J. D. Buck
Thomas Henry Huxley
H. G. Wells
Sydney T. Klein
Henry Hazlitt
Harvey Wickham
John Herschel
Sir Oliver Lodge
Auguste Comte
Joseph Jastrow
Herbert Spencer
James J. Walsh
T. Troward
Sir John William Dawson
Mary Baker Eddy
Sigmund Freud
George John Romanes
William Whewell
F. S. Marvin (ed.)
Lucien Lévy-Bruhl
Alexander Bain
Havelock Ellis
