We share an economy but not a culture. What is economics? A study of how we depend on strangers for our lifestyle. Some people find that unsettling.
Peter Drucker supposedly said "Culture eats strategy for breakfast." A variant on that is "Culture eats policy for breakfast." Culture excites people and policy makes their eyes glaze over. One of the more enduring elements of culture is music.
It takes less time to listen to a song than read a book or watch a movie. This might be why 4 of the top 5 people (counted by followers) on Twitter are musicians. (Obama tops the list, followed by Katy Perry, Justin Bieber, Rihanna, and Taylor Swift.) Music might be the most effective cultural glue we have.
Prediction? Eventually politics will devolve into a people - bored with policy and disappointed by politicians - voting on what song will be the national anthem for the next couple of years.
Then politics will really get ugly.