Yeah, that's true, me, from the past, but just for the sake of simplicity we're- Also, if you think about it, microbes are kinda animals, and plants are too, I mean- Oh my god, shut up before I kill you and create a time travel paradox. Microbes, like those hairy blokes back there, were a definite negative in terms of the Columbian Exchange. Terminology is hard here, but the majority of Caribbean Islanders or Native Americans or Amerindians had exactly one response to the arrival of Europeans. Death. We can't be sure how many natives died as a result of European arrival, but it was definitely more than 50%, and some estimates place it as high as 90%. Historians used to blame European brutality, which was definitely a factor, but the main culprit was disease. Smallpox is usually seen as the villain of this story, but it's more likely that a series of diseases in combination did the damage.