In Somali classical poetry every line must contain at least one word beginning with a chosen consonant (or with a vowel, treated as a single alliterating class), and this same sound governs every line of the entire poem rather than shifting between stanzas. This makes alliteration a sustained compositional constraint that limits vocabulary choices across the full length of the work.
In a society without printing or mass literacy, memorized and recited poems circulate across clan territories and serve as the primary medium for conducting disputes, mobilizing opinion, and waging political campaigns. A single composed poem can provoke a reply poem, generating chains of verse exchanges that carry live political argument.
Even without writing, individual poems remain attached to the names of their specific composers and are transmitted by reciters who aim to preserve the original wording rather than freely improvise. This treats the oral poem as an authored, relatively fixed text rather than an anonymous folk product that drifts with each telling.