Tech companies have changed everything.
Imagine how easily instant communication—and occasional misinformation—might have transformed historic events like the American Revolution (searching for extra boots on Craigslist from the snows of Valley Forge), or Shakespearean theater (promoting Hamlet on Twitter—"melancholy Dane sees father's ghost, finds out Mom was in on Dad's murder. Love interest goes crazy, many die. To be or not to be is the q."), or how Web MD might have curtailed spread of the Black Death ("avoid flea-carrying rats").