By David Crosby
By Edward de Bono
By Tony Schwartz, Catherine McCarthy, Ph.D., Jean Gomes
By Christopher Witt
By Jonquil Lowe
By Rosalind Eyben
By Paul Oberschneider
By A. L. Mabogunje
By Professor John Urry
By D.C. Hague
By Christine Harvey
By Chip R. Bell
By Jonathan Hemus
By Roger M. Schwarz
By Bart Sayle, Surinder Kumar, William Wrigley, Jr
By Jules Goddard, Tony Eccles
By Bruce J. Avolio, Bernard M. Bass
By Robert T. Kiyosaki
By John J. Gabarro, John P. Kotter
By Paul Polman, Andrew Winston
By John Morgan, Martin Brenig-Jones
By Miguel Rivas-Micoud
By Nigel Slack, Alistair Brandon-Jones, Robert Johnston
By Florence M. Stone
By John Woodhouse
By Margo Murray
By Sarah Knight
By Gillian Tett
By Tom Burgis
By Charles Tripp (Professor of Politics, School of Oriental and African Studies, University of London)