Song is a fundamental aspect of Tolkien's writing, serving the same role as it does in our own cultures. It is a means of documenting history, expressing cultural heritage and maintaining traditions for the people of Middle-earth. The Ents sing lists of lore. The Rohirrim sing of battle and heroic deeds and the Shire folk, of ale and frivolity. Let us not forget that Tolkien’s fictitious world, Arda, was effectively sung into existence via the Ainulindalë, the divine music of creation sung by the Ainur. The cultural significance of song is also a key element of Tolkien’s world building. The songs within the narrative bolster the authenticity of the various cultures of Middle-earth, embedding their history and heritage into the story. Music, rhymes and songs also help define characters. The lighter ones sung by hobbits, provide lighthearted moments, contrasting with the dark and dangerous tones of the larger narrative. It also reinforced their rustic heritage.