 Matthew Morrison was also my old college professor. This is Lawrence Wu, a producer on our show. And that class that Lawrence took has stuck with him since. We'll let him take it from here. Matthew's class is where I learned about the history of blackface minstrelsy and its connection to the birth of the popular music industry in the U.S., what's now a multi-billion dollar industry. Blackface minstrelsy is the first original form of American popular commercial music.