There have been many instances in our history where someone warned us about something, but we didn't listen at all. It seems that before almost any major event, a doctor, scientist, or politician already knew the outcome, but was simply ignored. It seems to be a repeating pattern, so the question this Redditor asked sparked a lot of interest from internet users.
Many chimed in to share all sorts of stories that are very insightful and eye-opening. Perhaps reading through them will help us get some perspective on our world and see that having an open mind is a very good thing. It seems that in a lot of instances, great tragedies might have been avoided if only people listened to each other more.