It's the practical erosion of Free Speech. Liberal (small "l" liberal) democracy and liberal science thrives on members: 1. Being willing to admit they may be wrong 2. Having access to a diverse information diet But the past two decades have shown erosion of not only legal Free Speech, but practical free speech: * Whereas previously they were just ignored (or even rebutted), today employees, students, and professors…
I see things almost completely opposite to you. Twenty years ago we had far less diverse access to information. You would get things from your local newspaper, or tv networks. Professionals would work and filter what we see. Today anyone can fire up a blog, twitter, youtube, and start talking about anything. People today thus have been getting exposed to all kinds of ideas, and being taken in by them: the earth is fl…
If you go looking for different opinions you can find them, but most people don’t do that. They let an algorithm generate their opinions for them by excluding anything that might challenge their views from their feed.