In this chapter you will learn about the history of rock music, including its unique relationship to other styles such as R & B, blues, and country and western. You will also get introduced to rock's preeminent bassist, Paul McCartney. Additionally, you will learn practical bass lines that use roots, fifths, major and minor thirds, major and minor sevenths, and major sixths. The chapter ends with an introduction to alternate tunings, including how to play in drop D.