Colombian exchange

It's a simple idea: the Columbian exchange. That means all the domesticated plants and animals that were exchanged between the "Old World" and the "New World" since the discovery of the ocean passage between Europe and the Americas. What immediately strikes my impressionist sense when I look at that list, is this: how much of life was simply incomplete before the Columbian exchange started! There is no cuisine on Earth that was not affected, or else completely transformed by it. Nations changed. Empires fell. A lot happened.