How do we know what we need to know?  In the mythical "old days" local newspaper editors selected stories for us to read, and, in Indianapolis, people read only three sources, The Indianapolis Star, The Indianapolis News, and The Indianapolis Times.  Therefore, everyone shared common information.  Not so today.  No one tells us what is important.  We must seek it out ourselves, usually without a foundation from which to seek.  Meanwhile,  the magnitude, the quantity of news sources, the diversity, has increased exponentially which means that a person seeking information must work hard, must check multiple sources, to find and evaluate.