This item the columbian exchange biological and cultural consequences of 1492 30th anniversary edition by alfred w crosby jr paperback 3293 in stock ships from and sold by amazoncom. The columbian exchange biological and cultural consequences of 1492 30th anniversary edition alfred w crosby jr thirty years ago alfred crosby published a small work that illuminated a simple point that the most important changes brought on by the voyages of columbus were not social or political but biological in nature. Buy the columbian exchange biological and cultural consequences of 1492 30th anniversary edition 30 by crosby jr alfred w isbn 9780275980924 from amazons book store everyday low prices and free delivery on eligible orders. Abebookscom the columbian exchange biological and cultural consequences of 1492 30th anniversary edition 9780275980924 by crosby jr alfred w and a great selection of similar new used and collectible books available now at great prices. This 30th anniversary edition of the columbian exchange includes a new preface from the author reflecting on the book and its creation and a new foreword by j r mcneill that demonstrates how crosby established a brand new perspective for understanding ecological and social events