Werner Sombart
Robert Blatchford
Allan L. Benson
W. H. Mallock
Samuel A. Barnett and Henrietta Barnett
John Spargo
Richard T. Ely
Upton Sinclair
Jack London
William Morris
William J. Ghent
Robert Rives La Monte
Paul Lafargue
H. G. Wells
George Bernard Shaw
John Rae
Thomas Kirkup
J. Ellis Barker
John Bates Clark
Edward Silvin (ed.)
Friedrich Engels
George Bernard Shaw and others
John Stuart Mill
