John Lie teaches at the University of California, Berkeley, and is the author of "K-pop: Economic Innovation, Cultural Amnesia, and Popular Music in Contemporary South Korea."
K-pop is skilled at using social media to promote good causes and fight racism

Donald Trump speaks during a campaign rally at the BOK Center in Tulsa on June 20: only 6,200 went through the turnstiles. © AP
John Lie teaches at the University of California, Berkeley, and is the author of "K-pop: Economic Innovation, Cultural Amnesia, and Popular Music in Contemporary South Korea."