Final answer:
Langston Hughes lists different rivers in his poem to illustrate the deep connection between various cultures, periods in history, and the enduring nature of human experiences alongside prominent waterways like the Euphrates, Congo, Nile, and Mississippi.
Step-by-step explanation:
The different rivers listed in the stanza from Langston Hughes's The Negro Speaks of Rivers serve to establish connections between diverse cultures and historical periods. When Hughes references rivers such as the Euphrates, the Congo, the Nile, and the Mississippi, he is connecting the collective experiences and histories of African and African-American peoples to these waterways, which have been central to civilizations and cultural identities. The mention of Abraham Lincoln alongside these rivers further bridges the gap between past and present, highlighting the ongoing struggle for freedom and equality.
The stanza "I've known rivers ancient as the world and older than the flow of human blood in human veins" suggests a deep connection to nature and the continuity of human history that predates modern societies. By saying his soul has grown deep like the rivers, Hughes emphasizes the profound and enduring spiritual connection between people and the natural world, as well as the influence of these rivers on human activities and civilizations.