by José Ingenieros
by Samuel Smiles
by Otto Weininger
by Loïs Bates
by William George Jordan
by Booker T. Washington
by Otto Weininger
by William Walker Atkinson
by Newell Dwight Hillis
by William Edward Hartpole Lecky
by Ralph Waldo Trine
by Dora Melegari
by Ralph Albert Parlette
by Newell Dwight Hillis
by Furneaux Jordan
by Abraham Myerson
by Robert E. (Robert Elliott) Speer
by Victor Mapes
by Madame de (Anne-Louise-Germaine) Staël
by Ede Tassy
by Lucy Helen Muriel Soulsby
by Mary G. (Mary Greene) Ware