William H. Mcneill
Julian Sanz, Jose Babiano
Olwen Hufton
Ulrich Beck
Nove Alec
Joan E. Garcés
Erik Olin Wright
Georges Duby
Aa.Vv.
Marcos Roitman Rosenmann
Holmes George
Clara Ramas San Miguel
Nicolás Buckley
Stach Reiner
Susan Golombok
Goran Therborn
Luis Enrique Alonso, Carlos J. Fernandez Rodriguez
Koyre A.
John Reed
Rude George
Moreno Pestaña Jose Luis
Ernesto Laclau
Hale J.R.
Harvey David
Alan F. Chalmers
Jon Elster
Walt Whitman
Alain Brossat
Marshall Berman
Suleiman Mourad
Lega. Leonor
Bernhard Zimmermann
Jean Piaget