Final answer:
The main theme of the poem, which centers on an orphan avenging his family, aligns with 'violence and revenge' due to its focus on warfare and the cycle of retribution.
Step-by-step explanation:
The main theme of the poem you’ve described, which focuses on a young orphan seeking vengeance for his murdered family, is most closely related to violence and revenge. The poem reflects upon the cycle of war and the conduct within battles, where achieving revenge can seem like a motivating force and a way to maintain order or honor. Themes like love and forgiveness, hope and resilience, or peace and harmony do not align as closely with the narrative of seeking retribution described in your question. The poem's depiction of revenge as motivation and the violence that typically accompanies it resonate with historical notions of what drives conflict, particularly within the scope of the 'Mourning Wars' described in one of the provided excerpts, where the cycle of vengeance was a significant aspect of warfare.