Carol Rumens' The Border Builder is a powerful poem about identity, belonging, power, and the dangers of reducing people to categories. Through the symbolic figure of a man obsessed with constructing borders, Rumens explores how societies create divisions based on nationality, race, politics, and other forms of classification, revealing the human cost of exclusion and surveillance. This analysis examines the poem's symbolism, political allegory, imagery, and use of bureaucratic language, exploring how Rumens critiques systems that define individuals through labels rather than humanity. Ideal for students and teachers studying Cambridge International AS & A Level Literature in English (9695), it includes line-by-line analysis, key quotes, themes, alternative interpretations, anthology comparisons, teaching ideas, and exam-focused insights.