At the end of last week Facebook announced that it would stop having humans write summaries of trending news stories. This follows previous allegations that the selection of trending stories had been changed to remove conservative ones. This is a good time to revisit some foundational questions about the spread of information in a digital world. First, it is too easy for information cascades to occur. It takes much less effort to like, share, retweet than it does to read, think and possibly e...
