the problems with our talking together do not stem from an absence of words. we have an excessive multitude of words : more words, less and less meaning. five-hundred-channel television services, millions of web sites, and an endless stream of opinion from every media source about the latest political or social scandal race their way to you in a wild contest for your attention. given so many different perspectives, we lose sight of any common sense we might make of it all.

여기에서 밑줄 친 it 이 가리키는 것이 무엇인가요?