[Verginius Rufus]

The exchange of new products between the Old World and the New World after 1492 is sometimes called the "Columbian Exchange." The Old World came out ahead--it gained a lot of valuable new commodities (tomatoes, potatoes, corn, chocolate, etc.) which were often more nutritious than the Old World products which entered the New World (although there were some useful ones--horses, cows, chickens, wheat, wine, olives, etc.). New World populations were decimated by Old World diseases. In return they gave the Europeans syphilis and tobacco.

[Tanniker Smith]

Nice summary, although some might argue against the introduction of cows to the New World. The cows displaced the buffalo and they had a negative effect on the land that they grazed on.

TS
(using weasal words, like "some might argue . . .")