Darrow Miller talks about how ideas spread, beginning with the philosophers and the intellectuals and continuing through the balladeers: the musicians, the poets, the writers.
His point is to encourage young Christian men and women who love the arts and are gifted in the arts to begin to speak prophetically to the culture. He wants to encourage pastors that when the church is at its healthiest, she is the wellspring of the arts for a nation.
Here is an example of ideas being spread through balladeers.