Alfred W. Crosby is a Professor Emeritus in American Studies, History and Geography at the University of Texas, Austin, where he taught for over twenty years. His previous books include America's Forgotten Pandemic: The Influenza of 1918, 2nd edition (Cambridge, 2003), Throwing Fire: Projectile Technology through History (Cambridge, 2002), The Measure of Reality: Quantification and Western Society, 1250–1600 (Cambridge, 1997). The Measure of Reality was chosen by the Los Angeles Times as one of the 100 most important books of 1997.

• 1. Prologue; 2. Pangaea revisited, the Neolithic reconsidered; 3. The Norse and the Crusaders; 4. The Fortunate Isles; 5. Winds; 6. Within reach, beyond grasp; 7. Weeds; 8. Animals; 9. Ills; 10. New Zealand; 11. Explanations; 12. Conclusion.

'In telling his very readable story, Mr Crosby combines a historian's taste for colorful detail with a scientist's hunger for unifying and testable generalization …[He] shows that there is more to history than kings and battles, and more to ecology than fruits and nuts.' The Wall Street Journal