By J. D. Y. Peel
By Rebo International
By Peter K Austin
By Michael Loewe
By John Darwin
By Alan Lester
By Robert O. Collins (University of California, Santa Barbara), James M. Burns (Clemson University, South Carolina)
By Gad J. Heuman
By Jose Marti
By M. M. Austin (University of St Andrews, Scotland)
By Stephen Howe
By Graeme Mount, Stephen Randall
By Professor of Anthropology Brian Fagan (University of California USA)
By Hartog, Francois
By Karin Barber
By Richard Gray
By Roland Oliver
By J. D. Fage
By J. Desmond Clark
By Michael Crowder
By Roland Oliver, G. N. Sanderson
By John E. Flint
By B. H. Liddell Hart
By Peter Warwick
By Raj Patel, Jason W. Moore
By Reader's Digest
By Elizabeth A. Foster
By Landeg White (University of York)
By Yasser Tabbaa
By JOHN MCCRACKEN