The Fir Bolg introduced concepts of sovereignty and territorial organization, ruling Ireland for thirty-seven years before their defeat at the First Battle of Mag Tuired. Despite losing to the Tuatha Dé Danann, they were granted Connacht and maintained their dignity as a people. Their name, meaning "men of bags," may reference their legendary labors in foreign lands. In poetry, the Fir Bolg represent political order, the establishment of provincial boundaries still recognized today, and the honorable defeated who maintain their identity. They symbolize the foundations of Irish governance and territorial consciousness.

The Fir Bolg, descendants of the Muintir Nemid, return to Ireland from Greece as slaves, bringing the bag (bolg) used for carrying earth; they establish the first provinces and kingship before battling the Tuatha Dé Danann at Moytura; Sreng, their champion, epitomizes honorable resistance; poets can use the Fir Bolg to explore themes of return, foundational governance, or dignified defeat; their name evokes labor, resilience, and the soil—useful in agrarian or nationalist poetry; they represent the human-scale precursor to the divine Tuatha.