This paper explores the fundamental tenets of Plato's philosophy of education, particularly his views on a practice of great educational potential: communal musical participation. According to Plato, music can attune the individual and the community to cosmic harmony and this, in turn, is the only way to form and maintain a community. The paper explores how the concepts of "ethos" and "nomos" are utilized to explain music's role in community cohesion. It argues that Plato's understanding of the power of immediate and pre-reflective participation in music can provide valuable insight for contemporary philosophy of music education. The concept of "nomos," in particular, allows music educators to take this frame of thought to better understand the role of music in creating communities.