First half is boring, but hits some on the head in the second half:
John Herrman in the Awl:
This “conceptual space for neutrality” follows from the idea that publications and reporters have a responsibility not just to discover and contextualize new information but to distribute it in a transparent or somehow balanced way. People demanded fairness from their local paper because it may have been their only local paper; people were sensitive to bias in network news because it was one of a few options providing a relatively scarce type of information. Their audiences afforded them powers: to talk to the powerful, to dedicate resources to investigations, to collect and summarize the news. These powers created a sense of obligation which, of course, they were free to fail to meet.