I will not make the argument that Columbus's arrival in the New World was insignificant merely because he was an absolutely awful person or because he didn't actually discover anything (which he himself maintained, claiming until his death that he'd merely found a different route to Asia). But think about this before you dismiss -- before Columbus, avocado, bell peppers, blueberries, cashews, cassava root, chili peppers, chocolate, cocaine, gourds, maize, peanuts, pecans pineapples, pumpkins, squash, tobacco, tomatoes, and vanilla were all unknown in the Old World and alcohol, apples, bananas, barley, cheese, coffee, mango, onions, rice, tea, and turnips, and wheat were unknown in the Americas. Imagine an existence without any of those and you can hopefully begin to get a taste of the importance of the Columbian Exchange. Imagine Italian cuisine without tomato sauce or gnocchi and you can't help but wonder if this is why Columbus is so dear to many Italians. Imagine, on the other hand, genocide, slavery, and old world diseases and you'll understand why he's even more hated by many others.