The underlying theme of the poem is the slavery or the racial discrimination of the blacks in the American plantations.
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 "<em>A song-lit race of slaves</em>", but even if the sun has set on that phase of time and history, it is upon the current generation not to forget the "<em>African- American experience</em>" that their forefathers had gone through in their time.
The theme of the poem is basically the American Discrimination. Discrimination is basically is a term which is used to define the difference b/w two groups on the base of some qualities etc. For example the American Discrimination was between black and white people.
