Johannes Guthenberg was a German goldsmith and typographer in the first half of the 1400s. He is considered to be the father of printing in Europe, as he introduced the printing press, which then started the Printing Revolution, and played an extremely important role in the development of the Reincassare and the modern world.
To be able to communicate with the audience and tell them whats going on in the piece. So using all of the dynamics to make it sound realistic and make the audience and anyone listens feel like something real is going on...