By Judith Scheele (University of Oxford)
By Russill
By Haile M. Larebo
By Thomas J. Bassett (University of Illinois, Urbana-Champaign)
By Francisco Gutierrez, Gerd Schoenwalder (IDRC)
By Nate Silver
By Kjetil Tronvoll, Daniel R. Mekonnen
By Alex De Waal
By Ghislaine Lydon (University of California, Los Angeles)
By Stanley Barrett
By W.Grant Muter, Ironbridge Gorge Museum Trust
By Joseph Hanlon
By Benjamin Pogrund, Harold Evans
By Nayan Chanda
By Robert Harms
By Helen Bradford
By Christopher Abel, Colin M. Lewis
By Allan G. Hill
By Ruth Dudley Edwards
By Christopher Leonard
By Walter Scheidel
By Ezekiel Gebissa
By Frederick Cooper (University of Michigan, Ann Arbor)
By Jean-Michel Severino, Olivier Ray
By Professor O Nigel Bolland
By Malcolm Cross, Gad Heuman
By Hugh Tinker
By D. K. Fieldhouse (Emeritus Professor and Emeritus Fellow, Emeritus Professor and Emeritus Fellow, Jesus College, Cambridge)
By Martin Lynn (Queen's University Belfast)