What kind of events are you looking for and in what country??
Answer:
It depends on what you have been taught, but I would personally say negative because of the diseases that destroyed Native Americans and the rise of slavery.
On the flip side, if you're thinking of positive, it did help exchange new ideas and goods (the Columbian Exchange) between the worlds. It also allowed a safe haven for those persecuted (like the Protestants) and allowed countries to dump their inmates onto the new land.
Historians would be most likely to study them to determine what they once held. Archaeologists would be the ones to find the clay jars and dig them up.
