Answer:
The underlying theme of the poem is the slavery or the racial discrimination of the blacks in the American plantations.
Step-by-step explanation:
Jean Toomer's "The Song of the Son" is a poem that displays the racial discrimination of the slaves that are working in the fields and plantations in the past. The given excerpt of the poem also mentions "A song-lit race of slaves", but even if the sun has set on that phase of time and history, it is upon the current generation not to forget the "African- American experience" that their forefathers had gone through in their time.