Gabriel Pierre Deville
Edward F. Adams
Hermon Basil Laymon
Bernard London
W. H. Gantz
Werner Sombart
Allan L. Benson
Fullerton L. Waldo
Samuel A. Barnett and Henrietta Barnett
John Spargo
Richard T. Ely
Henry Voorce Brandenburg & Co.
David Ames Wells
Robert Rives La Monte
George Bernard Shaw
John Rae
Thomas Kirkup
J. Ellis Barker
John Bates Clark
Edward Silvin (ed.)
Friedrich Engels
John Stuart Mill
W. H. Mallock
