NOTE FROM TED: This talk only represents the speaker's personal views and understanding of friendship, loneliness, and disease risk which remains an ongoing field of study. TEDx events are independently organized by volunteers. The guidelines we give TEDx organizers are described in more detail here: http://storage.ted.com/tedx/manuals/tedx_content_guidelines.pdf What if the most powerful force for our health, happiness, and even democracy has been hiding in plain sight? In a talk that opens with a betrayal ...