Write a review that discusses the impact of at least 2 traditions on our popular music of today; expound on the innovations of the 21st century, including the advancement of technology and glocalization. Focus especially on how the key terms apply.  
Sources to choose from
https://archive.org/details/americanmusicpan00cand/mode/1up?view=theater
https://archive.org/details/americasmusicfro0000chas_l7r2/mode/2up?view=theater
Lorenzo Candelaria and Daniel Kingman, American Music: A Panorama: 
Part II, Chapter 9, “Rock Music,” pages 128-145.   
Part IV, Chapter 12, “Secular Music in the Cities (