We have always known governments lie to get their laws passed. That companies lie and conceal to keep their profit margins up. That individuals lie to each other all day every day. but we tried to have people around who sought and dug for the truth. In the past they might have been historians and academics. In recent centuries they have been journalists. So what happens when they join the ranks of the liars? When they go for profits and not honesty. When they allow their prejudices to rule their writing?
When even they are compromised the nation is culturally dying.