Humanities Homework Help

I need support with this History question so I can learn better.

Considering the havoc that European explorers and settlers inflicted on Native Americans (intentionally or otherwise), we should learn from history so that, if we humans do explore outer space and encounter other worlds, we should mercifully leave them alone. Do you agree or disagree with this provocative statement?

Please post a thoughtful response that contains both facts about the European conquest of the Americas, with your own personal opinion about space exploration.