“Even if we have made the conscious decision to be nice to people we argue with, we’re still not going to be very good at it. Albert Mehrabian, a professor of psychology at UCLA, devised the 7-38-55 rule.30 Fifty-five percent of communication is through body language. People communicate 38 percent of their message through tone of voice. A mere 7 percent comes through spoken word. Social media is mostly text, so it’s easy to misattribute malice or sneers where there are none.”