Why do you suppose that the textbook starts our musical history segment with the Middle Ages? Why don't we talk about music before 400 AD? As you can well imagine, music has been around since the dawn of time. As long as our Earth is in vibration, sounds and music have been created (think of Caveman banging rocks or an indigenous tribe playing a bone flute for a sacred ceremony, for example). Why do the authors leave out prehistoric music or music before the Middle Ages? What kinds of things could the authors have included in the textbook about music, if they had more time to talk about music before 400 AD. Feel free to do a web search, but don't forget to cite your sources so you're not plagiarizing.