An issue I've seen becoming more a reality lately is that echo chambers are becoming self-sustaining. Moderators on popular discussion sites are becoming more

An issue I've seen becoming more a reality lately is that echo chambers are becoming self-sustaining. Moderators on popular discussion sites are becoming more and more emotionally driven, and maintain the status quo to the point that you can predict what you'll read and see well beforehand. The above being strictly an online issue, the answer I'd have: spend less time discussing things online, and more time doing it in real life.